The Texoma Challenge will take place on Saturday, June 6, 2026, starting at various times from 8:00 PM onward at Waterloo Park (1101 Waterloo Lake Drive) in Denison, TX. The event offers 50 km, 50 km relay, marathon, half marathon, 10 km, 10 km ruck, and 5 km distances, all following a 6.2‑mile loop of rooty and dirt single‑track trails with rolling hills (approximately 500 ft elevation gain per loop). A headlamp is required for all participants.
| Distance / Format | Start Time | Cut‑Off | Loop Count (6.2 miles/loop) | Ruck Weight | Inclusions |
|---|---|---|---|---|---|
| 50 km -- | 8:00 PM -- | 9 hours (until 5:00 AM Sunday) -- | Approx. 5 loops -- | Not applicable -- | Finisher medal; DFL “Dead Freakin’ Last” award -- |
| 50 km Relay -- | 8:30 PM -- | 9 hours (until 5:00 AM Sunday) -- | Team completes loops -- | Not applicable -- | 1st place championship team award; 2nd place runner‑up award -- |
| Marathon -- | 8:00 PM -- | 9 hours -- | Approx. 4.2 loops -- | Not applicable -- | Finisher medal -- |
| Half Marathon -- | 8:10 PM -- | 9 hours -- | Approx. 2.1 loops -- | Not applicable -- | Finisher medal -- |
| 10 km -- | 8:10 PM -- | 9 hours -- | 1 loop (approx.) -- | Not applicable -- | Finisher medal -- |
| 10 km Ruck -- | 8:10 PM -- | 9 hours -- | 1 loop (approx.) -- | 150+ lbs = 30 lb ruck; under 150 lbs = 20 lb ruck -- | Texoma Challenge RUCK patch instead of medal -- |
| 5 km -- | 8:20 PM -- | 9 hours -- | 0.5 loop (approx.) -- | Not applicable -- | Finisher medal -- |
All participants must follow event rules as provided by the organizer. This is a cup‑free race: runners must bring their own water‑carrying system (hydration pack, bottle, etc.). Packet pickup and the Texas Outlaw pop‑up store open at 6:00 PM. All events have a unified 9‑hour cut‑off, ending at 5:00 AM on Sunday, June 7. The course takes place on the Waterloo Trails in Denison, with an average historic temperature of 68–80°F.
The Texoma Challenge is a night trail running and rucking event in the foothills of North Texas, using the Waterloo Park trails. The 50 km and marathon start at 8:00 PM, with shorter distances starting shortly after. All distances share the same looped course with rolling hills, rooty single‑track, and no paper cups — participants carry their own hydration.
The Texoma Challenge in Denison offers nighttime trail running and rucking from 5 km to 50 km (plus relay) on a 6.2‑mile loop, with headlamp required, cup‑free hydration, finisher medals or ruck patch, and series bonuses for Texas Summer Night Series participants.
Jun 06, 2026
Distance — 50K
Type — Running
20:00
$135.00
Jun 06, 2026
Distance — 50K
Type — Running
20:00
$135.00
Jun 06, 2026
Distance — 42.2K
Type — Running
20:00
$120.00
Jun 06, 2026
Distance — 10K
Type — Running
20:10
$65.00
Jun 06, 2026
Distance — 10K
Type — Running
20:10
$65.00
Jun 06, 2026
Distance — 5K
Type — Running
20:10
$55.00
Jun 06, 2026
Distance — 21.1K
Type — Running
20:10
$90.00
These values represent the 3-year monthly averages for June in Denison.
Learn more about the host city, Denison.
Denison is in the Blackland Prairie region.
Read more launchWatch highlights and course previews from previous years.
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