Trail Running Calendar United States 2025-2026

Tackle 15 miles and 3,100 feet of climbing through high alpine La Plata Mountains, peaking near 12,200 feet at Kennebec Pass. Limited to 150 runners, this rugged trail race supports Search and Rescue and rewards top finishers with pies.

Blue Hill Mountain Trail Fest offers 5k to 50k trail distances on scenic coastal and forested routes with wildflower fields and summit views. Proceeds support local Indigenous groups and the land trust, and registration opens Jan 1, 2026.

Alpine trail racing at Taos Ski Valley on Aug 1 and 2 2026: the Up & Over 10K with a massive climb and technical descent, a steep Vert K, a kids fun run and two day Double Trouble. Shirts, medals and post race refreshments included.

Take on riders at Steel City Human vs Horse, a one of a kind trail endurance event at Hillman State Park. Choose 20k, 50k or 50M across single track, gravel and meadow trails with camping and a pre race safety meeting.

Sheep Mountain Trail Runs in Fairplay Colorado offers 50 mile, 50k and half marathon courses across technical singletrack and alpine roads averaging over 10,600 ft. Expect sweeping mountain views, tough terrain and variable August weather.

Run scenic 5K, 10K or half marathon around Green Valley Lake with lake loops, forest trails and a steady climb to a sweeping viewpoint. Celebrate after with food, live music and community energy while supporting the Children's Forest.

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 scenic single track and winding trails at the Oakadoke Trail Runs in Valparaiso on August 1, 2026, with 4, 9, and 18 mile options. Enjoy creek crossings, farmland views and a friendly post race gathering for all finishers.

The Waldo 100K will take place in Willamette Pass on Saturday 1 August 2026.

Take on Aspen Backcountry with 50K, marathon or heavy half routes from Rio Grande Park, mostly on scenic dirt trails and high alpine terrain. After the finish enjoy the Duck Derby festival with live music, food and local vendors.

Blazin' Summer Sufferfest is a night trail race at Cedar Hill State Park along Joe Pool Lake, with distances from a 5K up to multi loop ultramarathons. Expect varied forest and grassland terrain and bring your own light and hydration for a..

Hood Hundred is a 100-mile mountain trail run staged at Mt. Hood Meadows in the Mt. Hood National Forest, Oregon.The route uses a crew-accessible, wrap-around lollipop-course through diverse alpine terrain, featuring about 17,300 feet of as..

Tackle scenic East Bay trails in the historic Skyline 50K or choose a half marathon around Lake Chabot Marina in Castro Valley. Finish with a plant based BBQ and beer while families enjoy the festive atmosphere.

Challenge yourself on the Ely Mountain Trail Race at Balsam Forebay near Shaver Lake, CA, with 14K and 8K courses featuring steep climbs and sweeping Sierra views. Capped at 250 runners, both routes offer rugged singletrack and a festive fi..

Beat the heat at the Heatwave Half Marathon in Kansas City, offering distances from a kid dash and 1 mile to 5K, 10K and the half marathon. Enjoy a designer shirt, custom medal, chip timing, free photos and Kona Ice at the finish.

Tackle Salt and Sulfur 420 on August 5, 2026, a 420 mile run from Salt Lake City to West Yellowstone. This crewed event benefits the Women's Center in Salt Lake City with all proceeds donated.

Run the Lory Summer Trail Series at Lory State Park in Fort Collins this August with four midweek trail races from a fast 5k to a testing 12k. Perfect for newcomers and speed seekers, with post race pizza, drinks, and series awards.

Kansas City Backyard Ultra pairs the Last Runner Standing format with 12, 9, 6 and 3 hour timed races on a fast 1 mile loop around Mill Creek Park near the Country Club Plaza fountain. Expect aid every mile and a lively community vibe.

High Five 100 is a self guided mountain challenge from Lake City, Colorado: roughly 90 to 105 miles with about 40,000 ft of climbing and summiting five 14ers. Finish the unmarked route within 48 hours; registration opens January 1, 2026.

Run the Butterfield Canyon Trail Marathon or Half in Herriman Utah on August 8 2026 along scenic single track and big climbs. Limited to 300 entrants, the race includes shirts, locally made medals, Great Harvest post race food and free phot..