Dinosaur Valley Endurance Run

Dinosaur Valley Endurance Run is held in Glen Rose, Texas, on November 21–22, 2026, in Dinosaur Valley. The first day carries the 100-mile and the 100K (62 miles) at 7:00 AM, then the 50K (31 miles), the 25K (15.5 miles) and a 5-mile at 8:00 AM, with a second 5-mile going off at 8:00 PM. The second day repeats a 25K and a 5-mile at 8:00 AM for runners who want a shorter Sunday.

A two-day menu like this lets a family or a training group split up without splitting apart: one runner takes the 100-miler while another does a 5-mile and comes back for a second one. If the 100 miles is your target, the 7:00 AM start means one full night out, so rehearse headlamp running and night eating during your build. The 25K is the sweet spot for a first Texas trail race.