You are here:
Dinosaur Valley Endurance Run
Race Details:
- Location: Glen Rose, TX, USA
- Race Date: 11/21/2026
- Race Distances: 100 Kilometer, 100 Mile, Ultra Marathon
What This Race Counts Toward:
Western States 100: Yes
UTMB Index: No
Dinosaur Valley Endurance Run Description
The Dinosaur Valley Endurance Run takes place on a rolling, looped trail course through Dinosaur Valley State Park outside Glen Rose, Texas, with distances from 5 miles up to 100 miles. The 100-mile course covers nine laps of a 10.5-mile loop plus a final 5-mile stretch, climbing roughly 9,000 feet of rolling Texas hill country over packed dirt, rock, and slickrock, with sweeping overlooks along the way. Both the 100-mile and 100K distances serve as Western States qualifiers, drawing a supportive, back-of-the-pack-friendly field to this Hill Country classic each November.
Always check the official race website for the most accurate and up-to-date race information and logistics.
Share This Race
Shop This Race
Handpicked for runners toeing this line.
Dinosaur Valley Endurance Run Additional Details:
The 100 Mile and 100K both start Saturday at 7:00 AM, with the 100K field also splitting off from 100-milers who record their 100K split at the six-loop mark. There is no fixed finish cutoff for these distances; instead, runners must clear a series of incremental last-loop cutoffs, and the finish line stays open, within reason, for anyone still moving. Racers under 60 in the 100K or 100 miler can pick up a pacer at mile 52.5, while those 60 and older may request one for the full race. Drop bags are allowed at the start/finish and at the Fence Line aid station, delivered out to mile 8 after the start. Average November conditions run a cool 40 to 69 degrees Fahrenheit, with sunrise around 7:08 AM and sunset by 5:27 PM.
Course Information
Profile: Hilly
Type: Multiple Loops
Surface: Mostly Trails
Pace Groups: No
Time Limit: 35 hr (100M), 22 hr (100K)
# of Finishers
100K: 227 finishers (2025)
100 Mile: 55 finishers (2025)
Elevation Details
Elevation Gain: 9,000 ft (100M), 5,700 ft (100K)
Elevation Loss: 9,000 ft (100M), 5,700 ft (100K)
Average Temperature
- Low: 40°F
- High: 69°F
Train Smarter for Race Day
A great race starts long before the starting line. Whether you’re chasing your first finish or hunting a new PR, a structured training plan takes the guesswork out of race prep — building your fitness, your confidence, and your mileage at the right pace for you.
Explore plans for every distance and experience level, from your first 5K to your next ultra.
Ultramarathon Training Plans
Explore structured plans across every ultra distance, from your first 50K to 100 miles and beyond.
Things to Do in Glen Rose, TX, USA
Make the most of race weekend — here’s how to fill the time before and after you cross the finish line.
We're still building out our local guide for this city — check back soon!
Hotels & Lodging Near the Dinosaur Valley Endurance Run
Compare nearby hotels and book your Dinosaur Valley Endurance Run race-weekend stay in seconds.
Sunrise Running Company may earn a commission if you book through the map below, at no extra cost to you.
Featured Race
A pancake-flat course made for chasing a PR — and a Boston Qualifier.
Boston Qualifier: Yes
Other Races In Texas
Boston Qualifier: Yes
World Major Qualifier: Yes