Isle du Bois Trail Run – *Spring Rain* Course Info and Maps

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2015/2016 COURSE TWEAK INSIGHT: All of north Texas received huge rains over the last year that filled all our lakes (yeah!) but it also caused lots of flooding.

Unfortunately the high water levels impacted  a section of the trail system (Loop E) which had been part of our course and will require significant assessment, trail re-work, and paperwork. Loop E is still closed so we are currently staying with our modified course distances of 5 mile, 14 mile, 23 mile, and 52 km.

START/FINISH LOCATION: The start/finish will be at Group Pavilion #2, located at the north east corner of the beach parking lot. See Course Map for more details.



A fun mix of well-groomed flowing single-track and periodically better-pay-attention trail. There are a few roots throughout the course but you will forget about most of them while hopping over, around, and on top of sections scattered rock. Some rocks are loose and some aren’t going anywhere. Lots of fun!

5 mile – One (1) x 5.31 mile clock-wise loop

14 mile – (One (1) x 5.31 mile clock-wise loop ) + (One (1) x 9.08 mile clock-wise loop))

23 mile – (One (1) x 5.31 mile clock-wise loop ) + (Two (2) x 9.08 mile clock-wise loop))

52 km – (One (1) x 5.31 mile clock-wise loop ) + (Three (3) x 9.08 mile clock-wise loop))

Course Map



**Course distance measured with a Rolatape Professional Series measuring wheel.

Course is subject to change and if so, maps/information will be updated and runners notified immediately.

AID STATIONS: Again, all aid stations will be rockin’ the cup-free status! Please bring your own water bottle or hydration system.

See Cup-Free Racing Support for a list of hydrous options to support this transition.

The 5 mile runners will have one (1) fully supported aid station.

The 14 mile runners will have two (4) fully supported aid stations.

The 23 mile runners will have five (7) fully supported aid stations.

The 52 km runners will have eight (10) fully supported aid stations.

The fully supported aid-stations will contain water, electrolyte drink, and a buffet table of other sugary and salty goodies.

DROP BAGS: An area for any 52km/23M/14M drop bags with be available at the Beach aid station (turnaround) area.

CUT-OFF TIMES: 9 hour time limit! The entire course will be officially closed at 4:30 PM.

Below are the intermediate cut-offs based on the slowest average pace to finish within the 9 hour limit based on the 52 km start time.

Intermediate warnings/cut-offs for all runners:

  • You must start your last loop by 2:00 PM.
  • You must reach North Pole aid station on your last loop by 2:50 PM.

If you cannot make these cut-off times, you will be kindly escorted from the race and listed as a DQFBIP (Didn’t Quite Finish But Inspired Plenty)…but you will always still be a member of this tribe!