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blueBlack Isle Du Bois Full Loop

  4.1 ( 7 ) Favorite


10.6 mile 17.0 kilometer loop
100% Singletrack


Ascent: 901' 275 m
Descent: -908' -277 m
High: 742' 226 m
Low: 656' 200 m


Avg Grade: 3% (2°)
Max Grade: 11% (6°)


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Trail shared by Marcus Troxell

A nice trail that feels like backcountry riding less than an hour from the city.

Marcus Troxell

E-Bikes Unknown

Features -none-

Check park hours and the DORBA site for trail closure after rain.


This ride is the full loop of the Isle Du Bois trail system. It features some of the most technical riding in DFW, primarily in the form of rock gardens. There are also some sections with flow, nice lake views, and lots of wildlife sightings.

Need to Know

Entry to the trail requires a $7/person fee or an annual Texas State Parks pass.


The Isle Du Bois (IDB for short) mountain bike trail is located inside Ray Roberts Lake State Park (Isle Du Bois unit) in Pilot Point, TX.

Park at the DORBA trailhead, and the trail starts on the east side. The trail is a one-way stacked loop traveling clockwise. Starting with Loop A and Loop B, you are lulled into a sense of security by the ease of the trail. Sure, there are a lot of small rocks (more-so than most DFW trails) but it's not bad. After crossing the road, you get on Loop C where the real fun starts.

You'll soon encounter rock gardens of increasing difficulty. Take the "difficult" alternate lines to really test your skills. When you reach the intersection with the paved path you'll start on Loop D, which is more of the same. When you come to a clearing/fire road, keep left to continue on to Loop E which runs right up on the shore of the lake in a few spots and also includes, surprise, more rock gardens. You'll come back to the fire road; again stay left to get back on Loop D.

This section actually has a little bit of flow and fewer rock gardens. Cross the paved path to get back on Loop C, and be rewarded with some of the flowiest sections of the trail. This section also includes some of the bigger climbs, but fun downhills as well. Cross the road again to get back on Loop B to Loop A for a bit of a cool down before ending the ride (or catching another lap).

Biked this trail?

We need help with the following missing trail information:

Dogs Allowed, Features, E-Bikes Allowed, History & Background


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Nov 24, 2018
Frederic Nicholson
Nov 18, 2018
Matt G
Lots and lots of rocks. Big rocks. Little rocks. All the rocks. 10.6mi
Nov 16, 2018
Dominic Mrdjan
First time riding this trail. 8mi — 8h 00m
Nov 16, 2018
Jeremy Bechthold
First time out - leaves made it tough to pick a good line but the climbs were tough! Fun trail!!! 10.2mi
Jul 28, 2018
Cameron Bickert
Feels very secluded, even passed by some deer. Rocky technical climbs. I would not call them black diamonds. No drops. Took a dip in the lake after. 10.1mi
May 22, 2018
Jeff Carter

Trail Ratings

  4.1 from 7 votes


  4.1 from 7 votes
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