Jasper Mountain Trail Fest Marathon
Jasper Mountain Trail Fest gives Dayton a rugged full trail marathon, with two loops through Jasper Mountain Reserve and more than 5,000 feet of gain.
Every link above goes to the race, its timing provider, or an official registration partner. Last checked August 4, 2026.
Quick facts
- 26.2 miles with more than 5,000 feet of elevation gain.
- Two passes combining the reserve's red, green, and black loops.
- Staged inside Jasper Mountain Reserve near Dayton as part of a conservation-focused weekend.
- Late June starts cool and turns warm, so climbing and descent management beat pace math.
2027 Jasper Mountain Trail Fest Marathon registration
Registration for the 2027 Jasper Mountain Trail Fest Marathon runs through the official registration page at runsignup.com.
About the Jasper Mountain Trail Fest Marathon
Jasper Mountain Trail Fest includes a solo full marathon inside a conservation-focused trail weekend at Jasper Mountain Reserve. It is a small, rugged alternative to road racing in southeast Washington.
Course
The full marathon runs two passes of the reserve's trail system, combining the red, green, and black loops for 26.2 miles with more than 5,000 feet of elevation gain.
Race-day weather
Late June near Dayton can bring warm afternoon conditions after a cooler start. Trail exposure, climbing, and descent management matter more than road-marathon pace targets.
Past Jasper Mountain Trail Fest Marathon dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2027 | Saturday, June 19, 2027 | Upcoming | — |
| 2026 | Saturday, June 20, 2026 | Completed | Open results |
| 2025 | Saturday, June 21, 2025 | Completed | Open results |
| 2024 | Saturday, July 6, 2024 | Completed | Open results |
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Jasper Mountain Trail Fest Marathon FAQ
When is the Jasper Mountain Trail Fest Marathon?
The 2027 Jasper Mountain Trail Fest Marathon is on Saturday, June 19, 2027.
How do I register for the Jasper Mountain Trail Fest Marathon?
Register for the Jasper Mountain Trail Fest Marathon through the official registration link: marathonscout.com/go/jasper-mountain-trail-fest-marathon/register. It opens the race registration page at runsignup.com.
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