Dinosaur Valley 100 Mile
Dinosaur Valley 100 Mile loops through a North Texas state park, accumulating gradual climbs and technical fatigue across rocky, mixed trail.
Every link above goes to the race, its timing provider, or an official registration partner. Last checked July 23, 2026.
Quick facts
- Saturday start on November 21, 2026
- Mandatory 7:00 a.m. start
- Dinosaur Valley State Park loops
- Mixed rocky and runnable trail
2026 Dinosaur Valley 100 Mile registration
Registration for the 2026 Dinosaur Valley 100 Mile runs through the official registration page at ultrasignup.com.
About the Dinosaur Valley 100 Mile
A mandatory 7 a.m. start sends the independently scored 100-mile field out ahead of Dinosaur Valley's 100K and shorter races.
Course
Repeated state-park loops combine gradual rollers, rocks, roots and runnable dirt, with modest features becoming harder late in the race.
Race-day weather
Late November may be cool and dry, but Texas can also produce warmth, wind, rain or a sharp overnight temperature drop.
Past Dinosaur Valley 100 Mile dates and results
| Year | Date | Status | Results |
|---|---|---|---|
| 2026 | Saturday, November 21, 2026 | Upcoming | — |
| 2025 | — | Completed | Open results |
| 2024 | — | Completed | Open results |
Dinosaur Valley 100 Mile FAQ
When is the Dinosaur Valley 100 Mile?
The 2026 Dinosaur Valley 100 Mile is on Saturday, November 21, 2026.
How do I register for the Dinosaur Valley 100 Mile?
Register for the Dinosaur Valley 100 Mile through the official registration link: marathonscout.com/go/dinosaur-valley-100-mile/register. It opens the race registration page at ultrasignup.com.
Send Marathon Scout an official race update
Send us confirmed dates, registration links, results, live tracking, or course changes. Every update is reviewed before it goes live.