Ultramarathon Race Calendar and Guides

Anchorage RunFest's 49K climbs five significant hills on a certified city-and-greenbelt route capped at 150 runners for its Alaska field each August.

Four flat loops through Englewood MetroPark near Dayton make Another Dam 50k one of Ohio's fastest club ultras and a popular first 50k pick.

Grand Raid des Pyrénées Ultra Tour 160 crosses high Pyrenean terrain from Vielle-Aure in a long, steep circuit built for experienced mountain runners.

Green Lakes' runnable 100K circles an eight-mile New York trail loop eight times, mixing shaded lakeshore, steep forest climbs, and exposed meadow miles.

Four eight-mile loops make Green Lakes a runnable trail 50K, mixing shaded lakeshore paths, short forest climbs, and exposed summer meadows.

Habanero Hundred 100 Mile starts at noon in intense August heat, challenging runners to complete sixteen sandy 10K trail loops at 7IL Ranch.

Leadville Trail 100 Run is a high-altitude Colorado out-and-back from Leadville, crossing Hope Pass and topping out near 12,500 feet in thin air.

Twisted Branch covers roughly 102 kilometers point to point across New York's Finger Lakes, linking remote trails from Naples to Hammondsport.

Two full-mountain climbs, 5,100 meters of gain, and a 24-hour cutoff make Whistler's 100K a technical alpine test across ski-area and forest trails.

TDS crosses 145 kilometres from Courmayeur through the Aosta Valley and Beaufortain with 9,500 metres of climbing before Chamonix in late August.

OCC covers 60 km from Orsieres to Chamonix, delivering a sharp UTMB week mountain race with 3,500 meters of climbing and a fast 50K-final field.

CCC runs 101 km from Courmayeur to Chamonix, pairing 6,050 meters of climbing with a high-demand UTMB week 100K final across three countries.

UTMB is the 174 km Mont-Blanc loop from Chamonix, a 100M final with 9,900 meters of climbing, major crowds, and a full alpine night out for the field.

Backyard Ås builds a large Norwegian endurance gathering around hourly 6.7 km yards, student pricing, and an accessible sports-centre base near Oslo.

SwissPeaks 170 sends runners across roughly 168 kilometres of steep Valais mountain terrain, linking Oberwald with the shores of Lake Geneva.

A 100-kilometer route over Great Wall ruins, alpine grasslands, military tunnels, and old trade paths gives Zhangjiakou's DGW100 a rare historic profile.

Superior 100 Mile follows the rugged Superior Hiking Trail from Gooseberry State Park to Lutsen across northeast Minnesota's North Shore in September.

Ultra-Trail Harricana 125 follows a rugged linear route through Quebec's Charlevoix backcountry with about 4,635 metres of climbing in September.

Wasatch Front 100 crosses Utah's rugged range from Kaysville to Soldier Hollow, stacking about 24,000 feet of ascent into a strict 36-hour clock.

Wildstrubel 100 sends runners around a 113-kilometre Alpine loop from Crans-Montana, with 6,600 metres of climbing and a 30-hour limit overnight.

A southwest Ohio trail 50K in its fourth decade, run as four loops of Germantown MetroPark through cedar forest, prairie, and Twin Creek hills.

Only 82 kilometers long but packed with 5,600 meters of gain, Kaçkar's high passes, river crossings, and remote village trails make this a severe 100K.

Nearly 100 kilometers through Taiping rainforest, steep staircases, creek crossings, and rough forest track make MY100 a humid, technical 32-hour ultra.

Mogollon Monster 100 covers 102.3 rugged miles along Arizona's Mogollon Rim, with about 15,900 feet of climbing and a 38-hour limit in September.

Pine Creek Challenge 100 Mile runs four passages through Pennsylvania's Pine Creek Gorge on a scenic, nontechnical and highly runnable rail-trail course.

The Youngstown Ultra Trail Classic has looped Mill Creek Park for about two decades, running a 50K on singletrack past gorges, lakes, and waterfalls.

The Rut 50K climbs technical mountain terrain around Big Sky and Lone Peak, combining exposed scrambling, steep grades and a capped field each September.

Tor des Géants loops 330 kilometers around the Aosta Valley with 24,000 meters of climbing, no forced stages, mountain refuges, and a 150-hour limit.

Grindstone by UTMB 100M tackles 104 miles and nearly 21,000 feet of climbing through Virginia's technical Allegheny Mountains each September.

Julian Alps Trail Run 120K links Radovljica and Kranjska Gora over 124 kilometres, adding 5,893 metres of climbing and a 32-hour limit through Slovenia.

Atlantic Forest climbs, 4,850 meters of gain, and the historic Caminho do Ouro shape Paraty's 108K from the coast to Serra do Mar and its colonial center.

Run Rabbit Run 100 combines a tough high-country loop around Steamboat Springs with separate Hare and Tortoise starts and a six-figure prize purse.

The Barkley Fall Classic condenses Frozen Head's steep, rough backcountry character into a one-day 50K with a large but selective field in eastern Tennessee.

IMTUF 100 is a rugged mountain hundred around McCall, combining remote Idaho singletrack, sustained climbing and a deeply established ultra community.

Mountain Lakes 100 circles remote Oregon lakes and Cascade forest on a mountain course known for runnable trail and sustained nighttime miles.

Muruvik repeats a flat 6.7 km path between Muruvik and Hommelvik, pairing record-friendly terrain with one of Norway's largest backyard fields.

A flat rails-to-trails 100K that starts and ends at the Eiffel Tower replica in Paris, Texas, with 50K, marathon, and evening races the same day.

A point to point trail ultra across North Carolina's Sauratown Mountains, with a 50 mile flagship from Pilot Mountain to Hanging Rock and a 50K option.

Heart Core Trail climbs through Heidelberg's wooded hills for 45 km, pairing roughly 2,019 metres of ascent with UTMB Index and iTRA relevance.

Bear 100 Mile runs point to point from Logan toward Bear Lake, with 22,816 feet of climbing, fall colors and a 36-hour mountain cutoff each autumn.

Nice Côte d'Azur by UTMB 100M drops from the Mercantour high country to the Mediterranean over 165 kilometres and 8,900 metres of gain over two days.

A low-cost 24-hour classic circles Hinson Lake on a certified 1.5032-mile trail loop, with chip-timed laps, wooded shade, and a deep waitlist.

Lisboa Backyard Ultra turns Monsanto Forest Park into an hourly 6.706 km proving ground, combining city access with a wooded endurance setting.

A high country trail festival on Colorado's Rainbow Trail, with a 104 mile flagship plus 100K, 50 mile, and 50K races from a ranch base near Westcliffe.

Sky Island sends 50K runners onto mile-high trails in the Davis Mountains near Fort Davis, with about 3,900 feet of climbing and long desert views.

Spartathlon follows Pheidippides' route for 246 kilometers from Athens to Sparta, with 75 checkpoints and an unforgiving 36-hour overall limit.

The Lakes TrailFest closes Alaska's fall trail season with a 50K, 25K, 10K, and 5K on rolling wooded singletrack at Matanuska Lakes near Palmer.

Farm to Farm's 50-mile loop race links Wolfe's Neck Center and conservation trails in Freeport, offering repeated aid access on mixed trail.

Vermont 50 Ultra Run covers fifty miles of private trails, woods roads and steep Green Mountain terrain around Mount Ascutney each early autumn.

Rarámuri 100M sends runners 135 kilometres through Mexico's remote Copper Canyon, pairing 6,700 metres of climbing with a demanding 32-hour cutoff.

UTLMBY circles Monteux's Lac de Beaulieu on fast hourly 6.70 km yards, drawing a capped field and performances with global at-large relevance.

Infinity Trail Île d'Aix sends hourly yards around a car-light Atlantic island, mixing coastal tracks, sand, roads, bridges, and historic walls.

Jeju100M covers 148 kilometers of volcanic mountain terrain, pairing a nighttime start and Mount Halla summit with 5,000 meters of gain and 37 hours.

Angeles Crest 100 is a Southern California mountain 100-miler through the San Gabriels, known for heat, altitude swings, and old-school endurance.

Arkansas Traveller 100 is a classic Ouachita endurance run over forest roads and trails, pairing a 100-mile course with a 30-hour limit in early October.

Cuyamaca 100K traverses oak woodland, pine forest, chaparral and desert-edge trail near San Diego, with a 19-hour limit and live pods each October.

Hennepin Hundred 100 Mile follows Illinois' historic canal trail from Sterling toward Colona on a flat, fast and highly runnable point-to-point route.

Ultra Pirineu 100K loops through Cadí-Moixeró from Bagà, covering 100 kilometres with 6,600 metres of climbing and mostly trail terrain in the Pyrenees.

About 6,300 feet of climbing carries this Montana 50K to the summit of Big Mountain, with proceeds funding Whitefish Trail building and upkeep.

Kodiak 100M circles Big Bear Valley over 100.6 mountain miles, reaching Sugarloaf and the Pacific Crest Trail with 15,912 feet of gain in October.

Moab 240 makes one enormous 241.8-mile loop through Utah desert and two mountain ranges, with 31,892 feet of gain, sleep stations, and a 112-hour cutoff.

The West Virginia Trilogy stacks a 50K, a 50 mile, and a half marathon across three October days on mountain trails near Spruce Knob in Circleville.

Yeti 100 Mile Endurance Run delivers a highly runnable rail-trail hundred through southwest Virginia, centered on the Virginia Creeper Trail.

A single road loop of Canandaigua Lake in peak fall color, the CanLake 50 mile has anchored Finger Lakes ultrarunning for more than two decades.

Run since 1982 on the gravel North Fork Road along the west edge of Glacier National Park, Le Grizz is one of the oldest 50 mile ultras in the country.

Oil Creek 100 Mile repeats rugged Gerard Hiking Trail loops near Titusville, accumulating about 17,627 feet of gain under a 32-hour cutoff each year.

A choose-your-distance ultra on a certified 4.5-mile Lake Merced loop, where runners hit 50K and decide on the spot whether to press on to 50 miles.

The Mammoth Trail Run puts a 100K and 50K on steep, rocky ranch trails near Glen Rose, Texas, with a 26 hour cutoff that runs deep into the night.

A point to point 100 miler across northern Michigan, running Petoskey to Alpena from Lake Michigan to Lake Huron, with 100K, 50K, and relay options.

Diagonale des Fous crosses Réunion from Saint-Pierre to Saint-Denis over 175 kilometers and 10,500 meters of climbing through volcanic terrain.

Mount Yun UMY 100M crosses 161 kilometres where the Loess Plateau meets the Taiyue Mountains, with 6,500 metres of ascent and a 48-hour cutoff.

The original backyard ultra alternates global team and individual championships on Laz Lake's Tennessee course, where every hour demands another yard.

Australia's satellite championship brings a 15-runner national field to Perth for hourly yards across trail, grass, and asphalt under the bell.

Team Belgium returns to Retie for a 15-runner satellite championship shaped by hourly strategy, team scoring, and deep-yard ambition on forest paths.

Canada's satellite championship assembles a 15-runner national team for synchronized hourly yards, collective scoring, and a national title.

Finland's national backyard team meets for an hourly elimination championship where every completed yard matters to both runner and country.

France's 15-runner satellite team contests an open-ended sequence of hourly yards, balancing national scoring with last-runner survival for the crown.

Germany's national satellite championship shifts between day and night yards in Simmerath as 15 runners build a shared team score for the global table.

Greece's national championship brings 15 selected runners to Kefalonia for hourly trail-and-tarmac yards and synchronized team scoring on an island course.

Japan's selected backyard team joins the synchronized global championship, chasing cumulative yards, a national title, and the road to Big's.

The Netherlands fields 15 selected runners in Leersum, where a repeated hourly yard feeds both the Dutch score and the national-title race outright.

New Zealand's 15-runner national team takes on synchronized hourly yards, with each survival adding to the country score and the last-runner title race.

South Africa's selected team gathers near Potchefstroom for hourly yards at Lekwena Wildlife Estate and a shared global championship score over many hours.

Spain's national team races low-climb gravel-and-asphalt yards in Cartagena, combining individual attrition with synchronized country scoring.

Sweden's 15-runner national squad meets in Bromölla for repeating hourly yards, team points, and the individual last-runner title through autumn darkness.

The United Kingdom's selected team contests synchronized hourly yards, combining a national championship with a cumulative world-team score.

Repeated canal-side circuits build this 100K in Titusville, creating a crew-friendly Delaware River ultra with simple logistics and steady pacing.

Hard-packed sand replaces singletrack in this point-to-point 50K along the Galveston Island shoreline, run west to east with sunrise over the Gulf.

A runnable San Diego 50K on wide dirt trails along Lake Hodges, with the Raptor Ridge climb faced twice on an approachable first-ultra course.

Salomon Cappadocia Ultra-Trail covers 119K through Urgup's valleys and plateaus, mixing runnable trail with a full day of climbing around Cappadocia.

Deep in the PA Wilds, this 50K links rail trail, dirt road, and Elk State Forest running from Emporium, with 25K and 12K races on the same day.

Grand Trail des Templiers covers 80.7 kilometres and 3,443 metres of climbing across the rugged limestone plateaus and valleys around Millau.

I Sassi di Matera crosses 144 kilometres from Matera's cave districts to the Ionian coast through limestone canyons, olive groves and scrub.

Two laps of a climbing 25K loop give this north Alabama trail 50K over 5,000 feet of gain on Two Mountain Trail singletrack above McMullen Cove.

A trail 50K on the grounds of Camp Croft, the WWII infantry training center turned state park, built as a tribute to prisoners of war and veterans.

Hixon 50 sends ultrarunners up La Crosse's river bluffs twice, packing roughly 8,000 feet of climbing into a 50K of singletrack above the Mississippi.

Chartreuse Backyard repeats a flat riverside 6.706 km yard beneath the mountains, making a fast French silver race built for deep totals in cool weather.

Kullamannen Ultra 100 Miles runs 173 kilometres across southern Sweden's rocky coasts and reserves in darkness, wind and autumn weather in late October.

Mallorca by UTMB's Serra de Tramuntana crosses 138K of dry-stone paths, limestone ridges, and village mountain terrain between coast and Port de Soller.

Javelina Jundred is a desert 100-miler at McDowell Mountain, blending rolling Sonoran singletrack, loops, heat management, and a party finish.

Naatsisaan's 50K arcs around Lost Mesa from Navajo Mountain High School, combining dirt road, old doubletrack and trail in Diné Bikéyah in remote Utah.

Ozark Trail 100 Mile Endurance Run crosses 101 miles of Mark Twain National Forest on remote singletrack with about 12,000 feet of rugged climbing.

Arrowtown Backyard Ultra uses a scenic 6.71 km figure-eight beside the Arrow River and Bush Creek, with a compact historic town as its race base.

Pinhoti 100 follows a rugged point-to-point line across Alabama's highest terrain, combining long singletrack, jeep roads and rocky forest ridges.

Race for DFL makes last place the goal on a 4.167-mile Massachusetts farm yard, mixing trail, gravel, grass, a bonfire, and community aid in one loop.

Rio Del Lago 100 Mile starts at Beal's Point and crosses Sierra foothill trails east of Sacramento, returning for its twenty-fifth running each November.

This November trail festival in Raccoon Creek State Park pairs a rocky 50K and 20 miler with shorter runs, funding veteran outdoor recreation programs.

TransLantau100 by UTMB crosses 104 kilometres and 4,500 metres of steep climbing through Lantau Island's remote country parks from coastal Mui Wo.

BigFoot Chandigarh brings the last-runner-standing format to the Shivalik foothills, with hourly 6.706 km yards and a developing Indian series.

God's Own Backyard Fall mixes Yorkshire canal, field, and woodland yards by day before shifting to a relentless tarmac towpath after dark near Leeds.

A flat 50K on paved greenway loops in Owensboro, Kentucky, with aid roughly every mile, easy crew access, and a weekend of shorter distances.

Tunnel Hill 100 Mile uses the flat, fast Tunnel Hill State Trail in southern Illinois, a course known for elite times and record attempts each November.

TRONADOR 130K tours Patagonia's forests, lakes and Andean ridges around Bariloche, packing 6,516 metres of ascent into a 132-kilometre route.

Last Samurai Standing Tokyo repeats a forest-road 6.706 km yard from Takao Green Center, pairing a tiny field with cold overnight running near Mount Takao.

Dinosaur Valley 100 Mile loops through a North Texas state park, accumulating gradual climbs and technical fatigue across rocky, mixed trail.

Missouri's RRCA 50K state championship runs out-and-back on the flat, shaded Ruby Jack rail-trail in Carthage, with certified splits and cash prizes.

JFK 50 Mile blends rocky Appalachian Trail, flat C&O Canal towpath, and rolling Maryland roads in one of America's oldest and fastest ultramarathons.

Ultra-Trail Cape Town UT100 front-loads two major climbs on a 99.1K Table Mountain loop with technical trail, 5,000 meters of gain, and a 26-hour limit.

A Thanksgiving weekend trail ultra at Turkey Bend on the Texas Colorado River, running 100 mile and 50 mile races before Saturday's 50K and marathon.

KosciMiler by UTMB covers 161 kilometres and 5,131 metres of climbing through Australia's rugged Snowy Mountains and over high Mount Kosciuszko.

ASICS SaintéLyon 80K links Saint-Étienne and Lyon overnight across the Monts du Lyonnais, drawing nearly 8,000 runners to a storied winter classic.

Chiang Dao 160 covers 173 kilometers from Doi Luang Chiang Dao to Chiang Mai, with 9,800 meters of gain, mountain villages, and a 48-hour limit.

Bigfoot 50K closes the Ohio trail season in December at Salt Fork State Park, where three hilly bridle-trail loops usually come with serious mud.

Brazos Bend 100 Mile uses flat crushed-rock and park trails in coastal Texas, with alligators, a 32-hour limit and Western States demand each December.

Eight laps of a hilly 12.7-mile loop make up this December 100 miler at Camp Crooked Creek south of Louisville, with 2,300 feet of climb per lap.

A December 100K through the ridges of Jackson-Washington State Forest in southern Indiana, with about 9,200 feet of climbing and a 24-hour cutoff.

Margalla Backyard Ultra brings an open-ended 6.7 km yard to Islamabad's F-9 Park, combining a runnable circuit with Pakistan's growing trail scene.

Ray Miller's 50-mile course brings nearly 14,000 feet of gain and loss to Point Mugu trails, with ocean views, steep fire roads, and a 15-hour limit.

The Ray Miller 50K packs nearly 6,000 feet of gain and loss into Point Mugu State Park, with exposed ridges, ocean views, and steep coastal trails.

A December trail 50K along Millerton Lake and the San Joaquin River, with about 5,500 feet of climbing on Sierra foothill singletrack near Fresno.

Hajar Ultra crosses 154 kilometres of Oman's rugged mountain interior, combining 8,000 metres of ascent with wadis, ridges and remote plateaus.

Daytona 100 follows Florida's Atlantic barrier island from Jacksonville Beach toward Ponce Inlet on a paved, point-to-point 100-mile route each December.

Desert Solstice 100 Mile is an elite invitational track ultra in Phoenix, designed for precise pacing, fast splits, records and national-team standards.

An elite 24-hour invitational chases national and world marks on a flat 400-meter Phoenix track, with live splits and only 25 total starting places.

Across the Years 100 Mile offers a fixed-distance ultra within a six-day New Year running festival on a compact, accurately measured desert loop.

Across the Years gives runners six continuous days to build distance on a 1.42-mile mixed-surface loop, carrying the race through New Year's Day.

The Aussie Alpine Backyarder climbs through Falls Creek on hourly 6.71 km yards, pairing New Year's energy with altitude and 210 metres of gain.

A true winter backyard ultra in Idaho Falls, mixing horse track, desert, dirt, grass and pavement with heated indoor transition space beside the fairgrounds.

Avalon Benefit 50 Mile crosses Catalina Island on a historic trail-ultra route, pairing steep, rugged interior terrain with Pacific Ocean views.

Bandera 100K delivers two rocky Texas Hill Country loops where steep short climbs, loose footing, and sharp sotol make every mile more technical.

Four 12.5K loops of wide, rolling dirt trail around Salem Lake give Winston-Salem a January 50K with 25K, 12.5K, relay, and night 5K options nearby.

San Diego County's midwinter 50 miler runs San Pasqual Valley single track and fire road near Escondido, topped by a long climb to Raptor Ridge.

Three highland summits, technical jungle trails, and 5,533 meters of gain make LangBiang 100K a demanding point-to-point course outside Da Lat.

Montane Winter Spine Race is a nonstop 268-mile winter expedition along the full Pennine Way from Edale across wild terrain to the Scottish Borders.

Greece's original backyard ultra pairs a playful village-and-trail day yard with a smoother night loop and a communal base in rural Crete near Heraklion.

HURT 100 packs 24,500 feet of climbing into rooty Oahu rainforest loops, with tropical humidity, stream crossings, and a demanding 36-hour cutoff.

A flat 4.167-mile circuit through Camp Jordan Park makes this East Ridge backyard approachable early, while the hourly resets punish late pacing.

Arc 100M is a winter coastal ultra in Cornwall, running from Coverack toward Perranporth over exposed South West Coast Path terrain in January conditions.

Chalk, flint and gravel farm tracks stack about 180 meters of climbing every 6.78-kilometer yard, turning this winter backyard into a steep test.

Tulsa's paved River Parks trail keeps this winter 50K mostly flat, with two passes over its principal hill and a 9.5-hour time limit on race day.

A desert backyard ultra at Usery Mountain, with 4.1667-mile trail day yards, a road loop after dark and a separate last-runner-standing field.

PZ Backyard Ultra pairs a 6.706-kilometer hourly loop with a 48-hour ceiling in Costa Rica, starting at sunset and ending at 200 miles on the clock.

Hard-packed snow, deep winter cold and a warm indoor base define this Lévis backyard, where runners restart a 6.706-kilometer loop each hour.

Flat South Florida loops switch from grassy singletrack by day to gravel at night, with heat, humidity and a Bronze Ticket adding to the pressure.

Ten laps around Cassadaga's Lower Lake make up this no-frills 50K fundraiser, with flexible distance choices and no formal cutoff clock in winter.

Rocky Raccoon 100 is a fast, crew-friendly Texas hundred built from five forest loops, where roots and accumulated fatigue replace mountain-sized climbs.

Black Canyon 100K runs point-to-point through central Arizona desert from Mayer toward Phoenix, with fast net downhill miles and rugged trail sections.

India's original backyard returns near Gurugram with separate day and night yards, rewarding heat management, patient pacing, and adaptable gear.

Tarawera T102 runs from Kawerau to Rotorua through lakes, forests, waterfalls, and geothermal terrain on a comparatively runnable 102K profile.

A slight uphill outbound grade and matching downhill return define this low-key 50K on a railroad-grade gravel trail near Sedro-Woolley in winter.

The Coastal Challenge Expedition covers 249 kilometres in six stages along Costa Rica's Pacific coast, with jungle, beaches and 10,194 metres of ascent.

Full summer exposure and a nearly flat 6.706-kilometer loop leave little terrain to blame at this heat-focused backyard in Queensland's Darling Downs.

Transgrancanaria Classic crosses Gran Canaria from north to south overnight, combining 125 kilometers, volcanic trail, and 6,764 meters of gain.

Rocky singletrack above Lake Norfork gives David's Trail Endurance Run 50K nearly 5,000 feet of elevation change and a hard late-winter Ozark test.

Lake Vian's two-mile loop mixes pavement and wooded singletrack, bringing 100-mile runners past aid and the cheer zone on every Oklahoma circuit.

Queeny Park's rolling 4.19-mile loop mixes pavement, packed gravel and short dirt sections, with roughly 430 feet of climbing every hour in St. Louis.

ChesCo Race Fest builds its 50K from a flat 1.25-mile park loop, giving crews constant access and runners heated bathrooms between winter laps.

Desert singletrack at San Angelo State Park, where a March 100K crosses cactus flats and rocky hills with aid every few miles and a 24-hour limit.

Hachie 50 is a flat, fast 50 miler on tree-lined park paths in Waxahachie, a club-run March race that suits first 50s and time goals in equal measure.

Australia's huge frontyard ultra circles Herdsman Lake every hour, combining an open-ended backyard test with a lively, spectator-friendly base.

The Pistol Ultra is a fast paved greenway loop race in Alcoa, Tennessee, with 50K through 100 mile fields, a night 50 miler, and easy crew access.

Blackbeard's Revenge 100 runs the full length of the Outer Banks from Corolla to Hatteras, a paved point-to-point 100 miler ruled by coastal wind.

A small-field Virginia backyard ultra built for deep efforts, with rolling trail day yards, a fast paved night loop and chef-supported aid near DC.

Grass, gravel, trail and tarmac combine on a hilly 6.7-kilometer loop above Oslo, with city views and a Silver Ticket sharpening the field each spring.

Ohio's established backyard alternates a rugged 4.167-mile trail yard with a faster paved night loop, drawing deep fields to rural Lucasville.

Ultra Trail Chianti Castles runs 123 kilometres through Tuscany's vineyard hills and stone villages, adding 5,200 metres of climbing before its return to Radda.

Addo Elephant Trail Run 100 Mile crosses remote protected wilderness inside Addo Elephant National Park on a demanding 40-hour point-to-point route.

Morocco's established backyard ultra repeats a 6.706 km forest yard outside Salé, with simple runner-led support and room for a multi-day race.

Istria 100 Mile crosses 168 kilometres from Labin to Umag through mountains, forests and medieval towns, with 6,800 metres of climbing in early spring.

A New Zealand backyard ultra on a rolling pine-forest loop, pairing hourly 6.7 km yards with live lap data and a compact runner base for multi-day racing.

Umstead 100 gives runners a supported 100-mile loop race through William B. Umstead State Park near Raleigh, with a generous 30-hour time limit.

Two Oceans Ultramarathon covers 56 kilometres around the Cape Peninsula, including major climbs and the celebrated coastal sweep over Chapman's Peak.

From Los Cristianos beach to 3,555 meters on Mount Teide, this 110K crosses Tenerife south to north and finishes beside the Atlantic in Puerto de la Cruz.

The OAT Run 50K is an out-and-back on Olympic Adventure Trail singletrack, threading mossy forest between Olympic National Park and the Strait.

Zion 100 Mile crosses high-desert mesas, slickrock, technical singletrack and exposed rim country near Zion National Park in rugged southern Utah.

An open-ended Oregon backyard ultra with wooded riverfront day yards, paved night laps and a proven record of deep last-person-standing races.

Canyons 100M is a Sierra foothills UTMB World Series Major from China Wall to Auburn, built around runnable climbs, canyons, and Western States terrain.

Canyons 100K is a competitive Auburn-area ultra with China Wall start lines, canyon descents, UTMB Major status, and Western States stakes in spring.

A record-setting Belgian backyard ultra in Retie, with mixed forest and tarmac day yards and a fast gravel-and-road night course for deep international fields.

Thumb Coast Ultra runs 50 miles point to point across Michigan's Thumb from Harbor Beach to Caseville, mostly on quiet dirt roads, with a 50K option.

One of the Pacific Northwest's older trail events, Spokane River Run builds its 50K through riverside singletrack on a volunteer-led race day.

At the foot of Poland's Owl Mountains, this backyard pairs a fast 6.706 km loop with an enclosed base camp built for long, record-minded efforts.

Greenland Trail 50K runs four laps of smooth doubletrack across a Colorado open space, a fast and runnable spring ultra with Pikes Peak in view all day.

One of Norway's fastest-growing backyards uses a 50/50 asphalt and gravel loop in Svelvik, with a large spring field and open-ended hourly racing.

Thames Path 100 follows the river for a continuous 100 miles from Richmond to Oxford on a flat, highly runnable but deceptively demanding trail.

Cocodona 250 is a multi-day Arizona trail ultra from Black Canyon City to Flagstaff, with 250-plus miles, massive climbing, and live tracking demand.

A hilly Swiss backyard ultra on fixed forest roads above Zürich, where each 6.706 km yard adds about 130 metres of climbing through day and night.

Transvulcania Ultramaratón climbs from the La Palma coast to Roque de los Muchachos on a 73-kilometre volcanic route with 4,350 metres of ascent.

The 100K at Traverse City Trail Running Festival mixes Pere Marquette Forest singletrack and doubletrack from a compact Timber Ridge base near Traverse City.

An open-ended frontyard ultra in central Adelaide, where a public park loop, large field and live arena energy sharpen every hourly start in the city.

KEYS100 100 Mile runs point to point from Key Largo to Key West, crossing the tropical island chain on exposed roads and bridges beside the ocean.

Massanutten Mountain Trails 100 is a rocky Shenandoah Valley mountain race with more than 18,000 feet of rugged climbing and a 36-hour cutoff.

UTA100 threads 101 kilometers of Blue Mountains cliffs, valleys, stairs, and technical bush trail before the notorious final climb up Furber Steps.

A point-to-point 50 miler across New River Gorge National Park that ends in the near-empty rail town of Thurmond, with an Amtrak ride back to the start.

An evening-start 100K in Indiana's Morgan-Monroe State Forest with 8,500 feet of climbing, mostly singletrack, and a night of June heat and humidity.

Scout Mountain's 102.5-mile Idaho course climbs more than 21,000 feet through rugged forest terrain, unpredictable weather, and a Hardrock qualifier.

mozart 100 by UTMB is a 119K Salzkammergut ultra from Fuschl am See, with forest trails, alpine lakes, and hard late climbs near Salzburg, Austria.

Eight loops through Brady's Run Park make up this western Pennsylvania 100 miler, a June race with 100K, relay, and half marathon options on one course.

A midnight start sends Scout Mountain's 54.3-mile field through Idaho mountain trails, more than 10,000 feet of climbing, and likely snow or mud.

Scout Mountain's 36.2-mile 50K climbs about 7,400 feet above Pocatello, pairing long singletrack stretches with high-country snow and a 16-hour cutoff.

Shadow of the Giants sends 50K runners through Sierra National Forest trails, with spaced aid, an eight-hour cutoff and early-start option for late finishers.

A competitive open-ended backyard ultra on a wide, quick forest course at High Lodge, with chip timing, camping and a large support field of runners.

Monte Livata's high-country backyard sends runners around a 6.706 km circuit each hour, with self-supported crews and changing mountain conditions.

A large community field circles Coffs Harbour's shaded creek paths each hour, mixing smooth gravel, boardwalk and bitumen with minimal climbing.

South Downs Way 100 follows the national trail from Winchester to Eastbourne across exposed chalk ridges, rolling downs and open countryside.

Smooth, well-marked singletrack and generous cutoffs make this Sleepy Hollow State Park 50-miler approachable for a first long ultra in Michigan.

Comrades Marathon is South Africa's historic 89 km road ultra between Durban and Pietermaritzburg, with strict qualifying and a 12-hour cutoff.

Tahoe 200 makes a multi-day circuit around Lake Tahoe, combining more than 200 miles of remote high-altitude trail across California and Nevada.

Cacouna's rolling gravel yard crosses fields, marsh and woodland beside the St. Lawrence, pairing a fast 6.70 km loop with exposed riverside weather.

Lavaredo 120K sends runners into the Dolomites at 11 p.m., pairing 5,800 meters of gain with sunrise at Tre Cime and a celebrated Cortina finish.

Karratha's remote backyard repeats a flat 6.71 km loop across hard sand, gravel and red Pilbara dirt, where heat and exposed terrain drive the test.

Western States 100 is a landmark point-to-point California trail ultra from Olympic Valley to Auburn, with huge climbs, lottery entry, and race-week tracking.

Finger Lakes 50s sends its 50-mile field through three forest loops, cow pastures, slippery boardwalks, and roughly 3,900 feet of climbing in Hector.

Two 16.5-mile loops give the Finger Lakes 50K a muddy, runnable mix of singletrack, cow pastures, dirt roads, and about 2,600 feet of climbing.

Hardrock 100 is a 101.8-mile San Juan Mountains loop from Silverton with 33,441 feet of climbing, high passes, and a remote alpine finish at the rock.

A 4.167-mile Alaska trail yard climbs about 500 feet through Hatcher Pass singletrack, with creek crossings, midnight light and changing mountain weather.

Yellowstone Park's 50K rolls across Rendezvous ski trails and gravel near West Yellowstone, with wildlife country and an eight-hour window at altitude.

Poland's original backyard gathers an international field in Jabłonna, repeating a fast 6.706 km circuit from the palace and park complex each hour.

Cascade Crest 100 combines Pacific Crest Trail miles, a long railroad tunnel and about 23,000 feet of gain in Washington's Cascades each summer.

High Lonesome 100 loops through Colorado’s Sawatch Range with five alpine passes, 23,300 feet of climbing, and a 37-hour cutoff at high altitude.

The Bob Marshall 50K blends Seeley Creek ski trails, rugged singletrack and Forest Service roads beside Montana's Bob Marshall Wilderness near Seeley Lake.

Badwater 135 crosses Death Valley to Mt. Whitney, asking runners to cover 135 road miles, extreme heat, and three major climbs from start to finish.

Oregon Cascades 100 links high-desert terrain and Cascade forest on a point-to-point 100-mile trail journey finishing near Bend in Central Oregon.

Never Summer 100K spends 65.7 miles high in Colorado's State Forest State Park, with 14,500 feet of gain, alpine peaks and a strict 24-hour limit.

Bigfoot 200 is a 207.9-mile point-to-point expedition around Mount St. Helens with huge climbing, remote aid and multi-day logistics in the Cascades.

Boréalys Mont-Tremblant Odyssée 100K brings UTMB racing to Quebec on 81K of steep Laurentian forest trails and mountain terrain from Village Tremblant.

Squamish 50 Mile packs about 3,500 metres of climbing into a technical, mostly singletrack tour of British Columbia's Coast Mountains each August.

A private-venue German backyard ultra sends 150 selected runners onto a 6.7 km loop every hour, with live timing and a continuous broadcast.

The Clint Eastwood tests Brisbane runners on compact creekside yards, with a 72-yard course record and a history of heat, rain, and deep fields.

Eastern States 100 is a remote 103-mile Pennsylvania Wilds loop with more than 20,000 feet of climbing and a qualification requirement each August.

Birdy's circles Lake Towerrinning on hourly 6.71 km yards, pairing a dedicated race campground with one of Australia's deepest backyard traditions.

Austria's KAT100 100 Miles packs 169K and 9,000 meters of climbing into the Kitzbuhel Alps, with long ridgelines and rocky high trail near Fieberbrunn.

This midnight 51K follows Nevada's Extraterrestrial Highway near Area 51, combining high-desert elevation, darkness and a full-moon atmosphere.

Bob's Big Timber is a true Ohio farm backyard, pairing old-growth trail yards with generous race-camp access and a history of deep performances.

Canadian Death Race 118K crosses three mountain summits and the Smoky River in a rugged Grande Cache classic with a 24-hour cutoff each summer.

The Sheep Mountain 50 Mile averages over 10,600 feet above Fairplay, Colorado, mixing technical trail with remote forest roads high over South Park.

Waldo 100K is a remote Oregon mountain loop over Fuji, the Twins and Maiden Peak, combining high-country singletrack with a 20-hour limit each summer.

Lean Horse 100 Mile follows the George S. Mickelson Trail through South Dakota's Black Hills on a runnable crushed-limestone rail-trail route.

Burning River 100 Mile crosses northeast Ohio parks and trails on an out-and-back endurance course with roughly 8,000 feet of climbing in midsummer.

Speedgoat 50K climbs 11,318 feet around Snowbird, linking steep ski-area trails, 11,000-foot summits, rocky descents, and a hard 13-hour cutoff.

Eiger E101 packs 6,700 meters of climbing into 101 alpine kilometers around Grindelwald, with exposed passes and the Eiger North Face late in the route.

A demanding Michigan backyard ultra that shifts from technical lakeside woodland yards to a rolling park-road loop after dark and a compact crew base.

Dawg Gone Long gives 50-mile runners a generous 14.5-hour cutoff on hot summer trails, with cupless aid and mandatory carried hydration all day.

Last Stand 1776 follows the backyard format: a 4.18-mile loop every hour until one runner remains, with proceeds supporting military families.

A rural Queensland backyard ultra repeats a 6.706 km farm loop every hour on Iona near Nanango, where the format's 119-yard world record was set.

MIUT Legend crosses Madeira from Porto Moniz to Machico, packing 7,200 meters of climbing into 110 kilometers of forest, peaks, and coastal trail.

Mt. FUJI 100 circles the mountain region on a 165-kilometer point-to-point course, pairing 6,461 meters of climbing with a deep Japanese field.

BPN's broadcast-driven backyard ultra repeats a 4.167-mile ranch loop every hour, drawing a selected field to a demanding last-runner-standing test.

Marathon des Sables Legendary asks runners to cover about 270 Saharan kilometers in six stages while carrying their own food and mandatory equipment.

Hong Kong 100 links beaches, villages, ridgelines, and country parks before a late climb over Tai Mo Shan, packing more than 5,000 meters of ascent.

Fat Dog 120 crosses remote British Columbia mountain terrain from Cathedral Provincial Park to Manning Park with a demanding 48-hour cutoff.