Six rocky loops through Dinosaur Valley—a Western States qualifier for under-22s
Six loops of the 10.5-mile main course deliver nearly 5,700 feet of climbing across rocky, technical terrain that surprises runners expecting mild Texas hills. The course surface—embedded limestone, slickrock, and rooted woodland singletrack—demands consistent focus underfoot, while sweeping hilltop overlooks offer a reward for every climb. Finishing in under 22 hours earns a Western States Endurance Run qualifier. All 100K starters share the course and start time with 100 mile runners, creating a unified multi-distance atmosphere.
Some ultra experience recommended
Glen Rose, TX, United StatesNovember 21, 2026
Dinosaur Valley Endurance Run 100K is a loop trail race in Glen Rose, TX, United States, held on November 21, 2026. The course covers 63 miles, climbs 3,100 ft, and has a 34h cutoff.
| Location | Mile | Elevation | Cutoff | Crew | Pacers | Drop bags |
|---|---|---|---|---|---|---|
Start Start | 0.0 | 682 ft | — | |||
Finish Finish | 62.9 | 679 ft | 34h5:00 PM +1 |
Aid station details for this race are still being filled in. Cutoffs and access rules come from the race’s own published information and can change — check the official race details before planning around them.
Sign in for race-day weather at every station, points of interest, segment-by-segment analysis, pacing, and to save this race to your calendar.
Three options at Dinosaur Valley State Park (across the river from the race start). Triceratops Sites: RV/tent with electric/water hookups, $25/night. Pachy Group Camp: tent-only, $10/person/night. Car camping also available. Reservations open in Spring via the race (not the park). Free camping available for race volunteers.
No required gear specified
No recommended gear specified
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