Trail Running Calendar United States 2026-2027

High-elevation trail and ultra races around Fairplay, Colorado, with 50 Mile, 50k and Half Marathon options, technical and remote terrain, aid stations, drop bags, pacer rules, and a 16 hour time limit.

A 100 miles mountain trail race at Mt Hood Meadows with a lollipop-loop course, 17,300 ft up and 17,300 ft down, crew accessible aid stations, chip timing and a 34 hour cutoff. The 2026 edition is a Western States Qualifier.

Remote trail races on Mt. St. Helens with a full loop 50K and a shorter 25K. Routes run mostly on the Loowit Trail across lava, boulder fields, rivers and forest with thousands of feet of elevation change.

A 15 mile mountain trail race in Hesperus, Colorado, gaining about 3,100 feet and topping out near 12,200 feet at Kennebec Pass. This non profit event benefits La Plata County Search and Rescue and is limited to 150 runners.

A multi distance trail event on Blue Hill Mountain featuring 5k, 10k, 25k and 50k routes on figure eight loops, field paths and technical forest trails, with aid stations on course and proceeds to local conservation and tribal partners.

Trail runs at Twin Creeks Farm in Valparaiso feature tree covered single track, switchbacks, bridge crossings and farmland views. Races include 18 mile, 9 mile and 4 mile looped courses with finisher awards and youth pricing.

A trail running event in Aspen on August 1, 2026 offering 50K, marathon and heavy half marathon distances on mostly dirt trails, with remote aid stations, high alpine terrain and a finish line festival alongside the Duck Derby.

A night trail event at Cedar Hill State Park with approximate 5K, 10K, 18K, 36K and 54K options on the DORBA trail system. Runners must carry hydration and may need illumination for night sections; aid stations are limited.

High-elevation mountain trail races from Eagle Point Resort, Beaver, Utah, on August 1, 2026. Four distances (100K, 70K, marathon, half) on technical routes with significant climbing and mandatory safety gear for long distances.

Steel City Human vs Horse at Hillman State Park on August 1, 2026 pits runners against equestrians on scenic single track, gravel and meadow trails. Choose 20k, 50k or 50 mile for a rare side by side endurance race.

A mountain 5K, 10K and half marathon around Green Valley Lake, CA, featuring mixed paved and dirt surfaces, multiple aid stations, chip timing, race awards, and proceeds benefiting The Children’s Forest.

A two day trail running weekend at Taos Ski Valley on August 1 and 2 2026 featuring a 10K with a 2,612 ft climb, a 20K double loop, a vertical 1K up Al's Run, a kids 1K and combined race options.

Run the Vineyards at Bohemia Manor Farm offers scenic 5K and 8K courses through vineyards, waterfront and wooded trails, chip timed with live results. Finish with refreshments, a souvenir wine glass and an after party on the river.

Trail races on August 1, 2026 in West Yellowstone, Montana at Rendezvous Ski Trails. Events include Marathon, Half Marathon and 10K on Custer Gallatin National Forest trails; participants are advised to carry bear spray.

A pair of trail races in Afton, Wyoming on August 1, 2026, run on rugged Wilderness terrain. The event features 50k and 31k courses, starts and finishes at Cottonwood Lake and supports Star Valley High School track and cross country teams.

Ridge Reaper Trail Runs returns Aug 1, 2026 at Ward Pound Ridge Reservation near NYC, offering multiple distances from runnable loops to epic 50 mile challenges. Expect wooded technical trails, ridge views, finisher medals and podium awards..

Join the Triple Dog Dare in Irving on August 1, 2026, featuring 5K, 10K, 15K, an untimed 1 Mile, a free Kid's Dash and a virtual option. Enjoy a participation shirt and finisher medal while supporting Encounter Church.

Looped trail races at Thomas F. Riley Wilderness Park offering 5k through 30k and a 6 hour event on August 1, 2026; registration opens February 1.

A trail running event in Cimarron, New Mexico on August 1, 2026 offering 50 mile, marathon, 18 mile, and 8 mile races. Proceeds benefit Philmont Scout Ranch, a large high-adventure camp with more than 300 miles of trails.

Run the Mattawan Wildcat Road & Trail 5K, a spirited course from Mattawan Elementary winding through school fields into wooded trails. All finishers get a medal and proceeds support the Mattawan Public Education Foundation and Brainstrong.