Dinosaur Valley Endurance Run

Welcome to the beautiful Dinosaur Valley State Park in Glen Rose, Texas. The Active Joe brought North Texas its first 100 miler, and we continue to grow every year! We offer 5 distances so there's a challenge for every interest level.

In all these distances, you’ll be among other amazing athletes challenging themselves. There are lots of gradual up and downhills that add up, and a mix of terrain between soft dirt, rocks, and roots. Some parts are technical while other parts are super runnable. This is a pretty hilly 100 miler by Texas standards, and the terrain can trip you up as you fatigue. Use that first loop through the course to settle into a pace for the race and not go out too fast.