Le Grizz Ultramarathon

Event overview

Le Grizz is a set of running events held on Saturday, October 11, 2025, in Polebridge, Montana. The program for the day includes a 50-mile ultramarathon, a 50-mile relay, a 15K run, and a 5K run. The race is staged near Glacier National Park and follows roads that run along the North Fork of the Flathead River.

Course, terrain and organizer

The ultramarathon is run mainly on gravel roads that parallel the North Fork of the Flathead River, with views of the Crown of the Continent region and surrounding aspen and larch. Runners can generally expect about 2,300 feet of elevation gain over the 50-mile distance, over undulating gravel roads with occasional gentle inclines. The exact 2025 course is listed as to be determined because of recent road construction and possible re-routes. The Glacier Institute is the event organizer and fundraising beneficiary; proceeds and donations support the Big Creek Outdoor Education Center and its outdoor education programs. Visit the organization's website for the most recent information.