Texoma Challenge 2026

What is the terrain actually like?

Don't let the "rolling hills" description fool you into thinking this is a gentle stroll. You are running on dirt single-track with significant root exposure. The course is a 6.2-mile loop centered around Waterloo Park, and with roughly 500 feet of elevation gain per loop, the vertical adds up fast—especially if you're tackling the 50K. Check the layout on Caltopo ↗ before you commit.

Should I prepare for heat or cold?

Since this is a night event in June, you're dodging the worst of the Texas sun, but don't get complacent. Average temperatures hover between 68°F and 80°F. The real challenge isn't the heat; it's the humidity and the fact that you'll be working hard in the dark. Most importantly: bring your own hydration system. This is a "no cup" race, so if you show up expecting a paper cup at every aid station, you're going to have a bad time.

What are my distance and start time options?

The staggered starts are designed to keep the trails from becoming a congested mess.

• 8:00 PM: 50K & Marathon (The heavy hitters)
• 8:10 PM: Half Marathon, 10K & 10K Ruck
• 8:20 PM: 5K
• 8:30 PM: 50K Relay

If you're doing the 50K, you have a 9-hour cutoff (5:00 AM Sunday), so pace yourself early or the roots will find your ankles in the dark.

What do I get for finishing?

The swag is decent. Everyone gets a Texoma Challenge Tee, and distance runners receive a finisher medal. If you're a rucker, you get an exclusive patch instead of a medal. For the ultra-hardcore, there is a "Dead Freakin' Last" (DFL) award for the 50K and Relay finishers. If you're looking to build a collection, signing up for the Texas Summer Night Series is the smarter move to earn the exclusive duffle bag or plaque.

How much will this cost me?

Pricing follows a standard tiered structure. Early Bird registration is available from January 21 to March 2, which is your best bet for saving cash. Standard pricing runs from March 3 to May 22. If you wait until the late registration window (May 23 onwards), you're paying a premium and risking a sell-out. Register via Ultrasignup ↗.

How do I get to Denison?

You'll likely fly into Dallas/Fort Worth (DFW), which is the nearest major international hub. From there, it's about a 1.5 to 2-hour drive north. Denison is not a transit-heavy city, so do not rely on ride-shares or public transport; you will need a rental car to handle the logistics of getting to Waterloo Park and back to your accommodation.