About This Race
The Texoma Challenge brings runners to the rolling foothills of North Texas for a versatile endurance event at Waterloo Park in Denison. The race offers seven distance options from 5K to 50K, including a unique rucking division and relay format, making it accessible to runners across the experience spectrum. The course follows a distinctive 6.2-mile loop through varied terrain that showcases the natural character of the Cross Timbers region. Set against the backdrop of Lake Texoma, this event provides a testing ground for both newcomers to trail running and seasoned ultrarunners seeking a manageable challenge. The loop format allows for excellent spectator access and crew support, while the multiple distance options create a festival atmosphere where runners of all abilities share the trails. The relatively flat elevation profile makes this an approachable entry point for runners transitioning from road to trail, though the technical nature of North Texas terrain still demands respect and preparation.
The course consists of a 6.2-mile loop beginning and ending at Waterloo Park, with runners completing multiple laps based on their chosen distance. The terrain is described as 100% paths, suggesting singletrack and natural surface trails through the Cross Timbers ecosystem typical of this region. While elevation data shows minimal gain, North Texas trails often feature rolling terrain with short, punchy climbs and technical sections that can challenge runners despite modest overall elevation changes.
Elevation Profile
Course Map
Route shown is approximate and for illustration purposes.
Practical Info
Hot and humid Texas summer conditions with evening start times providing some relief from peak heat.
DFW - Dallas/Fort Worth International Airport
Denison offers various lodging options, with the race's proximity to the Dallas-Fort Worth metroplex providing additional accommodation choices within driving distance.
Best For
Notable Features
The Texoma Challenge's defining characteristic is its comprehensive distance offering, from 5K to 50K, all using the same 6.2-mile loop system. This creates a unique festival atmosphere where runners of all abilities share the same trails and support infrastructure, fostering an inclusive community environment rare in trail racing.
Prepare for This Race
GEAR GUIDE
The Best Hydration Vests for Ultrarunning in 2026
A tested guide to the best hydration vests for ultra marathons and long trail races — from lightweight racing vests to high-capacity mountain packs.
6 min read
RACE GUIDE
The Best Trail Races for Your First Ultra
A thoughtful guide to choosing your first ultra marathon — what to look for in a course, how to evaluate difficulty, and five races worth considering.
4 min read
FROM THE TRAIL
How to Read an Elevation Profile (And Why It Matters More Than Distance)
Elevation profiles reveal the true character of a trail race. Learn to read the shape of a course and understand what it means for your race day experience.
3 min read
GEAR GUIDE
The Best Hydration Vests for Ultrarunning in 2026
A tested guide to the best hydration vests for ultra marathons and long trail races — from lightweight racing vests to high-capacity mountain packs.
RACE GUIDE
The Best Trail Races for Your First Ultra
A thoughtful guide to choosing your first ultra marathon — what to look for in a course, how to evaluate difficulty, and five races worth considering.
FROM THE TRAIL
How to Read an Elevation Profile (And Why It Matters More Than Distance)
Elevation profiles reveal the true character of a trail race. Learn to read the shape of a course and understand what it means for your race day experience.