Isle du Bois Trail Run
Saturday, December 5, 2026
4M⋅ 10M ⋅ 20M ⋅ 50K
About The Race
Join us for the Isle Du Bois Trail Run located on the east side of Lake Ray Roberts, approximately one hour north of Dallas and Fort Worth. Isle Du Bois Trail Run was first put on by Endurance Buzz and then picked up by the Denton Area Running Club. We are excited to continue this North Texas tradition. The trails are a mix of well-groomed single track with some technical sections with roots and rocks and less than 1,000 feet of gain for each full loop.
IMPORTANT: All runners must carry a hydration device (i.e. Water Bottle or Hydration Bladder) to participate in the race. Distance between aid stations ranges from 1.5 to 4 miles.
While it doesn’t happen often, if there is significant rain, the race will be moved to the Greenbelt trail which is located at the same state park. If this occurs, we will communicate the change to all runners through email and social media.
Questions? Read our FAQs.
2025
Read the race info email sent to all registered runners.
Race results will be posted on race day here.
Location
Ray Roberts Lake, Isle du Bois Unit
Lake Ray Roberts, Isle Du Bois Unit
Pilot Point, TX 76258-8944
Ray Roberts Lake State Park is managed by Texas Parks & Wildlife. Learn more.
Park Fee: According to our event permit, you must purchase your day pass, have a camping pass, or have an annual Texas State Park Pass. You will be asked for confirmation at packet pick up on Friday or Saturday.
Events
- 4M Run (1 x ≈4M Loop)
- 10M Run (1 x ≈11M Loop)
- 20M Run (2 x ≈11M Loop)
- 50K Run (3 x ≈11M Loop)
*The funny squiggly lines in front of the distances “≈” means approximate.” In other words, don’t complain to us when the distance is longer or shorter. This is pretty common in Trail Running 😀
Race Schedule
| Friday | ||
| 4 – 6 p.m. | Packet Pickup at Trailhead Running Supply in Flower Mound | |
| Saturday, December 5, 2026 | ||
| 6:30 AM | Packet Pickup and Same Day Registration Opens. Closes at 8:30 AM | |
| 7:30 AM | 50K/20M Starts | |
| 8:00 AM | 10M Starts | |
| 8:30 AM | 4M Starts | |
| 1:45 PM | All runners must be on the final loop. | |
| 5:00 PM | Race Cutoff all runners must be off the course. | |
Course Map
Aid Stations
This is a cupless race. We do not provide cups to participants. However, we do sell a rubber reusable collapsible cup for $5 each that can be purchased at packet pick up. Water and endurance drink will be available at all aid stations along with typical aid station fare such as bananas, oranges, peanut butter and jelly sandwiches, potato chips, Oreos, fig cookies, soda, Salt Stick and much more.
All runners must carry a hydration device (i.e. Water Bottle or Hydration Bladder) to participate in the race.
Drop Bags
Runners in the 50K and 20 Mile race. Drop bags can be left at the Start/Finish aid station. However, please note that drop bags are left in this area at your own risk. We cannot be responsible in any way for your drop bag or it’s contents. Post race, please be sure and pick up your drop bag. Under no circumstances will we mail or deliver a drop bag back to it’s owner.
Pacers
Pacers are not allowed for any event. Any participant who runs with someone who has not registered and paid for the event will be disqualified.
Awards/Medals/Shirts
Lodging and Camping
Camping:
The Isle Du Bois State Park has camping sites for car camping/tent and RV. Dear Ridge camping area is within walking distance from the race start and includes bathroom/shower facilities nearby. Learn more and reserve with the park.
Lodging:
There are plenty of hotels in the area. The closest is the Lone Star Lodge and Marina, just 14 minutes away from the start.