50 Mile Race Details

The Le Grizz Ultramarathon is an undulating gravel road course with one short section of pavement at the start/end around the Mercantile. Racers will find themselves surrounded by the peaks of Southern British Columbia and Glacier National Park. The course meanders along the North Fork of the Flathead River.

  • Distance: approximately 50.1 miles
  • Start/End: Polebridge Mercantile
  • 80% gravel road
  • 20% paved road


You can review the 2022 course map here, a new course is being selected for 2023. We’re running to Canada this year! New course map coming soon.

2022 Polebridge Course Map-click for most accurate map of course

2022 Checkpoint/Aid Station locations & their shut down times

  • Glacier View Turnaround 10.1 miles: unmanned
  • Home Ranch Bottoms 15.6 miles: 11:00 a.m (2 hours)
  • Red Meadow 24.3 miles: unmanned – drop bags accepted
  • Community Hall 27.8 miles: 2:00 p.m. (4 hours)
  • Wurtz Cabin 31.8 miles: 3:00 p.m. (5 hours)
  • Trailcreek Road Jct. 34.7 miles: 3:30 p.m. (5 hours)
  • Wurtz Cabin 37.6 miles: 4:30 p.m. (5 hours)
  • Community Hall 41.6 miles: 5:15 p.m. (6 hours)
  • Red Meadow 45.1 miles: After last runner @ 41.6 miles before 6:15 p.m.
  • Finish: After last monitored runner

Drop bags

We accept drop bags at all named aid stations. Because some of the Checkpoints/Aid Stations going out and back are in the same place, you can combine some bags. You can leave items in your bags outbound, retrieving them on your return leg if you wish. Write your Name and Aid Destination on your bags addressed only to the Aid Stations: “Home Ranch Bottoms”, “Red Meadow,” “Community Hall,” “Wurtz Cabin” “Community Hall” We will not take drop bags to the first unmanned water stop.

Early Bird Start

There will be an early bird start for racers who run at a slower pace and have concerns about finishing before dark. The early birds will start at 6:30am instead of 7:30am. Please be prepared with headlamps if you are an early bird racer. Race times for early birds will be included with all other race results.


Both crewing and pacers are allowed at the Le Grizz. When crewing please park at aid stations or clear pull-outs marked along the road. The road will not be closed and be considerate of non-race traffic. Pacers need to be considerate of other racers. All participants running slower than a 12 hour pace must have their own crew to monitor them for safety. Racers running slower than a 12 hour pace without their own crew will be disqualified by staff.


There will be unique awards for the top runner in each age category: Open (up to 39), Masters (40-49), Seniors (50+).  There will be a unique award for all finishers.