Event Overview

The Texoma Challenge is an endurance event featuring a 5K, 10K, 10K Ruck, Half Marathon, Marathon, 50K, and 50K Relay in the foothills of North Texas at Waterloo Park. The event follows 6.2 mile loop of unique trails beginning and ending in Waterloo Park in Denison Texas.

Price Increases
Early Bird (August 10th through March 26th)
Standard (March 27th through June 12th)
Late Registration (June 13th, if not sold out)

Texas Summer Night Series

This race is a part of the Texas Summer Night Series. You can save up to 20% on the 2027 Texas Summer Night Series by registering for a Series Pass. You can choose your distance range or get the Midnight Monster Pass, which allows you to build up to the 40 Miler Race at the Noche Trail Run in September.

Series Passes will be available until June 4, 2027, lock in yours before! Sign Up for the Series Soon

Course Overview

- Surface: Rooty & dirt single-track trails.
- Course: Waterloo Trails Course Map
- Elevation: Rolling hills 500 ft elevation gain per loop.
- Location: Waterlooo Park (1101 Waterloo Lake Dr, Denison, TX 75020)
- Weather: Historic Average shows 70-91 degrees
- Pacer: Only allowed on the last 2 loops of the open 50K (not relay) (Signup Here)
- No Cup Race: We don't serve cups, please make sure to bring your own water-carrying system!

Location and Times

Waterloo Park - 1101 Waterloo Lake Dr, Denison, TX 75020

Schedule - Saturday
*Please arrive 60-45 min. before your start time*
6PM - packet pickup + Texas Outlaw pop-up store
8PM - 50K & Marathon STARTS
8:10PM - Half Marathon, 10K, & 10K RUCK STARTS
8:20PM - 5K STARTS
8:30PM - 5OK Relay STARTS
*headlamp required for ALL particpants*

Sunday
5AM - cutoff for all events (9 hours)

Ruck Weight requirements
- If you weigh more than 150 lbs = 30 lb. Ruck
- If you weigh less than 150 lbs = 20 lb. Ruck
Ruck Sack or Vest are allowed

What You Get

ALL DISTANCES
- Texoma Challenge Tee - A Texas Summer Night Series Collectible
- 1st place M&F award for All distances
Texoma Challenge finisher medal - A Texas Summer Night Series Collectible
- DFL "Dead Freakin' Last" award for the 50K & 50K relay
- Texoma Challenge 10K RUCK patch

EVENT EXPERIENCE:
- Aid Station Food & Hydration
- Scenic Course
- Photography
- Fully Marked/Supported Course
- Friendly & Encouraging Race Event/Volunteers

OUTLAW MEMBERSHIP

Most runners who do one Outlaw race end up doing several a year. If you already know this won’t be your last, check out Outlaw Membership. Pay once, get race credits you can use on eligible Outlaw events all year, plus member-only perks and priority access on select races. You still register through RunSignup/UltraSignup like normal, but members use special codes at checkout so their entries are covered. If you’re planning 3 or more races this season, it usually pays for itself on your way to the start line.

More Information/Policies/FAQ

For more detailed information, including the course map, other event info, and aid stations, please visit www.TexasOutlawRunning.com

For Policies regarding event communication, refunds/credits, discounts, ensuring race shirts/swag, lower entry prices, and changing distance, visit our Policies Page

For other questions, please make sure to look at our Frequently Asked Questions page before contacting us. If the answer is on that page, we may not respond. You can contact us by visiting our website. 

Event's current local time: 6:25 PM CT