Trail Running calendar near Island Park 2025-2026

Run the Dizzy Horse Backyard Ultra in Idaho Falls this December, tackling a 4.167 mile loop each hour until one runner remains. Expect mixed surfaces, winter snow and a cozy indoor aid area with limited upgrades.

Join a friendly winter group run through snowy woods to Lower Palisades Lake for scenic views and camaraderie. Free registration via UltraSignup and a post run potluck follows so bring a dish and your own bowl.

Run the Spitfire Ultra Trail Challenge on April 18, 2026 at North Menan Butte in Menan, Idaho. Choose from 55K, 30K, 12K or 5K across volcanic rock, sandy trails and sagebrush for a rugged scenic adventure with sweeping rim views.

Run Grand Targhee in early July amid alpine wildflower meadows and high ridgelines. Choose 50K, half marathon, 10K, Wildflower Hill Climb to Freds Mountain or a 1K kids race and enjoy a family friendly mountain weekend.

Run amid Grand Teton vistas at Teton Mountain Runs in mid July at Jackson Hole Mountain Resort. Choose from 50K, 30K or 15K trail races with wildflower lined routes, sweeping mountain views and summit waffles from Corbet's Cabin.

Enjoy scenic trails near Yellowstone with Marathon, half marathon and 10K routes featuring challenging climbs and single or double loops. Starts and finishes at Rendezvous Ski Trails with aid, GPX maps and a finishers medal.

Tackle the Cirque Series at Grand Targhee: a rugged 7.1 mile trail with 2,212 ft of climbing through alpine ridges and technical singletrack. Limited to 500 runners, expect stunning views, big climbs, and finish day swag.

The Rut Mountain Runs is a three day mountain trail festival in Big Sky, Montana, offering distances from a 1K fun run to an epic Trifecta ultramarathon across alpine terrain. Expect steep climbs, stunning views and a true test of endurance..