Race Details


Race Director:

Lisa Smith-Batchen

Race Start:



Race Finish:

West Yellowstone, MT (100 Miles)

Mesa Falls, ID (50 Miles)


Driggs, Idaho

 Packet Pick-up:

Friday September 18th 10am- 2pm (location TBA)

In West Yellowstone 5-7pm @ pre-race meeting

Race Sponsors:



Pre-Race Meeting:

Required for all 100 Mile runners
5:00 PM Friday at the Holiday Inn in West Yellowstone (50 Mile runners can receive information at packet pick-up or at the starting line on race morning.

Course Overview:


The 100-mile race starts in West Yellowstone and the 50-mile race starts at the midway point of the 100-mile course. This is a road race (mostly paved with some dirt) that primarily follows the beautiful Scenic By-way from Yellowstone National Park to the doorstep of the Grand Teton.  IMPORTANT: the Finish Line for the 2015 will be at the Teton Peaks Lodge & RV in Tetonia, ID. 


Please see the Registration Page for details. Registrations are non-refundable and non-transferable. 

Start Times:

100-mile: 4:00am  

50-mile: 9:00am

Time Limits:

100-mile race: 34 hour cut-off (was 32 hours)

50-mile race: 27 hour cut-off (29 hours)

Aid Stations:

8 fully staffed and stocked aid stations.  You may utilize a crew along the entire course as well.


Crew Access:

Please see the Race Rules for specific information regarding crew support.  Safety for runners and crew is the primary concern.



100-milers are allowed to have one pacer at a time after mile 50*.  50 milers are not allowed to have any pacers*.  *Runners over 60 will be allowed to have a pacer in either race at any time.


Finisher's buckle or medal for all races. Special awards to overall male & female finishers, age group awards.

Fund Raising:

A portion of the race entry fee will benefit a local Teton Valley non-profit