Trail Running calendar near Island Park 2025-2026

Big Bear Stampede is a trail-running event at Eagle Creek Campground in Gardiner, Montana, near Yellowstone National Park. It offers a 5k and 9k trail race, a 5k walk (untimed), and a 1k Kids Run with obstacles. The courses provide spectacular views of Electric Peak and other Yellowstone peaks, with..

The Rut Mountain Runs is a three-day mountain running event held at Big Sky Resort in Montana, scheduled for September 12-14, 2025. It features a variety of challenging races including a 50K, 28K, 21K, 11K, and the Lone Peak Vertical Kilometer, as well as a Trifecta challenge combining the 50K, 28K,..

Yellowstone Gateway 30K is a challenging off-road race in Pray, Montana, covering just over 18 miles from Sage Lodge to Chico Hot Springs. The course features a 10-mile climb into Emigrant Gulch followed by an 8-mile downhill, with upper elevations an out-and-back segment and the rest point-to-point..

The Dizzy Horse Backyard Ultra is a unique winter ultramarathon held in Idaho Falls, Idaho, featuring a 4.167-mile loop through a diverse course of desert, grass, horse-race tracks, gravel roads, and occasional snow. Participants run one loop every hour until only one runner remains, making it a tes..

Spitfire Ultra Trail Challenge, held near Menan, Idaho, at North Menan Butte, an extinct volcano, offers four distance options: 55K, 30K, 12K, and 5K. Runners traverse a dramatic mix of terrain on the volcano's west and east flanks, along the rim, and through its crater heart, with surfaces ranging..