Isle du Bois Trail Run

Saturday, December 7, 2024

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 from both 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.

2023 Isle Du Bois Race Results

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.


Ray Roberts Lake, Isle du Bois Unit

100 PW 4153
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, we must collect $10 per registered participant. When you arrive at packet pick up on Friday afternoon or Saturday morning, you MUST provide $10 in cash.


  • 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

Saturday, December 7, 2024
6:30 AMPacket Pickup and Same Day Registration Opens. Closes at 8:30 AM
7:30 AM50K/20M Starts
8:00 AM10M Starts
8:30 AM4M Starts
1:45 PMAll runners must be on the final loop.
5:00 PMRace 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 are not allowed for any event. Any participant who runs with someone who has not registered and paid for the event will be disqualified.


Lodging and 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.


 There are plenty of hotels in the area. The closest is the Lone Star Lodge and Marina, just 14 minutes away from the start.

Registration and Refund Policy

We understand that things come up. If you can no longer run the race, if you cancel more than 30 days in advance, you will receive 100% race credit for another Blaze Trails Running event. If you cancel between 30 days and two weeks prior to race day, you will receive 50% race credit towards another Blaze Trails Running event. We will not allow any refunds or transfers less than two weeks before race day. No exceptions.

To cancel, log into Ultrasignup > Registration History and select “Edit” to cancel your race. Your credit needs to be used within one year. If you need an extended time to use your credit due to medical reasons (including pregnancy) or military deployments, please reach out ahead of time.

Bib transfers to another runner are allowed up until the two weeks prior to the race only if the race has not sold out and there is no waitlist. If you are interested in transferring your bib to a friend, please contact us immediately. It is very important for the safety of all runners that we have the correct contact and medical information. If the shirt order has already been placed, your friend agrees to accept the shirt size that you ordered. A $15 administration fee (plus transaction fee) will be charged to the person who is accepting the bib transfer. We require transfers to be completed no later than two weeks prior to the race. This allows us to keep our focus on producing the event and other important race details during the race week. If you contact us in the last two weeks to ask for a transfer, we will not reply and the transfer is not allowed. No exceptions.

When you register, you acknowledge that we do not provide a refund if we are forced to cancel the race due to unforeseen circumstances that risk the safety of our participants due to conditions that are out of the race director’s control. This may include, but is not limited to flooding, lightning or any other weather condition that makes the course unsafe for participants.

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