Dinosaur Valley Endurance Run

04/22/2026

We get to run in some pretty incredible places and taking care of them is part of the deal.

From cupless racing
to compostable aid station supplies
to encouraging Leave No Trace principles

It’s on all of us to take care of the places that give us so much.


Video by Jacob Banta at Dino Valley 100.

04/21/2026

A little dino told me… Dinosaur Valley 50K on November 21 has only 5 more spots before the distance has its first ENTRY FEE INCREASE! Grab your spot, take on your first ultramarathon, or your 50th 50K! With literally 36 hours to complete it, you can finish without the anxiety of time cutoffs! Sign up today!
📸: Our amazing team of Dino Valley photographers: Jennifer Thorsen, John Knepper, Misty Herron

04/13/2026

The Active Joe brought you the first 100 miler in North Texas, and, with 16 years of race production, we continue to show up for the community to bring events that positively impact everyday "average joes" trying to get active. Whether it's your first trail 5 miler or your first 100 miler, we are there for you! Registration is filling for Dinosaur Valley Endurance Run on November 21. Choose from 8 races over the weekend, and sign up now!
📸: Our amazing team of Dino Valley photographers: Jennifer Thorsen, John Knepper, Misty Herron

04/11/2026

In the first 9 years of our event, we have had over 3,200 entrants! We are coming up to our TENTH annual event on November 21. Be part of the great Dallas-Fort Worth trail and ultra running community where we have distances for everyone. Want to try out running or hiking at night? We got you with the Jurassic 5 Miler! Want to complete your first 100 miler? We have generous cutoffs! Sign up today.
📸: Our amazing team of Dino Valley photographers: Jennifer Thorsen, John Knepper, Misty Herron

04/07/2026

Find out for yourself why runners and hikers return year after year to our events! Whether it's this race in November or one of our other The Active Joe trail or road races, there's a distance, a vista, a challenge, and a race for you!
📸: Our amazing team of Dino Valley photographers: Jennifer Thorsen, John Knepper, Misty Herron

The race is held at the beautiful Dinosaur Valley State Park in Glen Rose, Texas. This course has rolling and sustained ascents and descents that take you through varied terrain. There are amazing overlooks on this course where you can see for miles. The event offers race distances of 5 miles, 25K,....

04/04/2026

There’s no one pace that belongs out here.

We celebrate all speeds
offer flexible cutoffs
and believe that if you finish, you’re a finisher—period.

However you move, you’re part of this.
📷: Our Dino Valley photography team of Jenny Thorsen, John Knepper, and Misty Harrison!

03/20/2026

Did you know that Dino Valley 100 Mile is the 3rd largest 100 miler in all of Texas? (Based on finisher counts in 2025!) - Make Dino Valley your goal race for Fall 2026! Coming up on November 21-22 at beautiful Dinosaur Valley State Park in Glen Rose, collect your qualifier for the Western States Endurance Run with either the 100 mile or the 100K distance. Registration link in the comments!

The race is held at the beautiful Dinosaur Valley State Park in Glen Rose, Texas. This course has rolling and sustained ascents and descents that take you through varied terrain. There are amazing overlooks on this course where you can see for miles. The event offers race distances of 5 miles, 25K,....

02/24/2026

Have you run or hiked our race before and are ready to support the next group of participants?! Know someone who knows this race like the back of their hand? Have a friend who wants more "behind the scenes" time and maybe even an intro to what it is like directing races?! Then, THE BEACON IS LIT! 3 of our Volunteer Lead Team want THEIR turn racing this year, but that means we need 3 people to step up for a role at a more committed level than a shift volunteer. And we have a variety of roles too, so we can find one that fits your interests!

As one of the bigger 100 milers and 100Ks in Texas, a dedicated team makes it a success. We're a team of about 15 who help a majority of the weekend to get hundreds of runners and walkers across the finish line, with about 5,000 stops total at our busiest aid station!!

Email [email protected] if you're interested! Tag a friend who you think would be perfect to help out!

02/24/2026

Best vibes at our aid stations at Dinosaur Valley Endurance Run. Join us November 21. Western States qualifier in the 100M and 100K, vegan foods at the aid stations, amazing volunteers, a big area for crew to see you every 10.5 miles, and a dedicated Foot Care Team for you to use all through your race!
📸: Misty Herron