Dinosaur Valley Endurance Run 100K

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.