Course & Aid Info

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Following are details for each route offered through the Oz Trail Off-Road backcountry mountain bike event.

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Ozark 25 Backcountry Course

Ozark 35 Backcountry Course

Ozark 50 Backcountry Course

Aid Stations & Rider Support Crews

Our wonderful volunteers will staff 3 Aid Stations throughout the weekend:

  1. Lake Ann Aid Station (Fri, Sat & Sun)
  2. Pinyon Creek Aid Station (Sat & Sun)
  3. Euston Aid Station (Sat & Sun)



Participants may receive “hand-ups” from their support crews at the following locations:

  • Lake Ann Aid Station
  • Pinyon Creek Parking Lot: access off Castleford Dr.


  • Ozark 20 Fun Ride: Lake Ann Aid Station (at 15 miles)
  • Ozark 35 backcountry course:
    • Lake Ann Aid Station (at 15 miles)
    • Euston Aid Station (at 28 miles)
  • Ozark 50 backcountry course:
    • Lake Ann Aid Station (at 15 miles)
    • Pinyon Creek Aid Station (at 31 miles)
    • Euston Aid Station (at 40 miles)


Aid Station Fare

Each station will be equipped with V8 +Energy, cookies, oranges, pickles and Honey Stinger waffles.

If a rider prefers a different hydration mix or energy drink, we encourage them to bring their own and mix with the water provided on route.

Plan to start the event with a full hydration pack and plenty of food.

Cut-Off Times & DNF

Participants will be provided with ample time to complete their distance. However, the following cutoff times and locations have been established to ensure that riders return to the finish before Course Support (Medical, Traffic, Police, Communications, Volunteers) ends:

  • Friday (Ozark 25 Fun Ride): Course support ends at 6:00p
  • Saturday (Ozark 35 Amateur Ride): Riders arriving at the Lake Ann Aid Station after 11:00a will be re-routed and considered a DNF
  • Saturday (Ozark 50 Amateur Ride): Riders arriving at the intersection of Euston & Commonwealth Rd after 12:00p will be re-routed and considered a DNF
  • Sunday (Professional Backcountry Race): Racers are expected to finish by 1:30p

If the Race Director anticipates that you won’t complete the course before the time limits listed above, you may be asked to reroute to the Start/Finish area along a pre-determined (and more direct) path.

All DNF (Did Not Finish) riders are expected to email –or report to the Timing Booth– to inform us that they are no longer on the course.

Riders cut off by the race director will be considered a DNF, along with DNFs due to medical issues and mechanical failures. DNF riders may receive 50% off registration for the following year’s Oz Trails Off-Road, as a start line redemption opportunity.

Course Support – Hours of Operation

The Ozark 25 event is finished at 6:00p and the El Yucateco Pro Fat Tire Crit will be finished by 7p on Friday. The Ozark 35 & 50 events are finished at 4:00p on Saturday. The Ozark 50 Pro backcountry event is finished at 2:00p on Sunday. After each event day is finished, all course support will be closed.