Trail Running Calendar United States 2026-2027

Tough Mudder Colorado takes place at Fort Carson on September 26, 2026. Runners can choose a 15K with 20+ obstacles or a 5K with 12+ obstacles, with spectator and group options available.

Trail races of 5 miles, half and full marathon wind through Deception Pass State Park with ocean views, loops and a pedestrian crossing of the Deception Pass Bridge. The event starts and finishes at Bowman Bay and is cupless.

A 100 mile open road urban ultramarathon through Miami neighborhoods on September 26, 2026, limited to 50 runners and relying on crew support, checkpoints and directional cards. A 30 mile Miami 130 Challenge is available after the 100 miles..

Run, hike, or bike up the mountain in Tamarack to support suicide awareness and mental health recovery. Face a challenging elevation gain while collecting tokens of strength and enjoying views of Valley County.

A community driven 24 hour endurance race on a *0.82 mile* loop atop the Palmer Divide in Palmer Lake, Colorado. Top distance finishers receive awards and the first ten runners to reach 100 miles receive onsite buckles.

A Last Person Standing ultra near SP Crater in Flagstaff, AZ where runners repeat 4.167 miles each hour until one runner completes the final loop. The course mixes dirt trails and road with about 150 ft of elevation gain; water is available..

Trail marathon and half marathon along the Cossatot River in Wickes AR with rocky single-track, notable elevation gain, aid stations, medals and a shuttle for the half.

A one-way 2.5 mile ascent on Yonah Mountain near Cleveland, GA, gaining about 1,650 feet; timed from bottom to summit with an optional ruck division requiring minimum carried weight and a medal for finishers.

Timed running events at Gallatin Valley Regional Park in Bozeman offer 4 hour, 12 hour and 24 hour options on a flat 1.5 mile loop with a stocked aid station and free race photos.

A looped trail event at Cannonsburg Ski Area featuring 100 mile and 50 mile ultra options with large elevation gain, plus 10K and 20K single track races; aid station and crew access each loop, participant fields are limited.

Trail Half Marathon and 10K through Massey Meadow in the Uinta Mountains, featuring views of Dry Fork Canyon's Flume Trail, staffed aid stations, and a cash prize when a new course record is set.

A trail event at Welling Ridge Trails offering 4, 8, 16, 32 and 40 mile options, a 20 lb ruck relay, and finisher awards.

An off road 5 Miles obstacle course in Saint Charles, Iowa on September 26, 2026, hosted by Contributors Breakfast Club; the local fundraiser keeps proceeds in Iowa and lets participants help design several obstacles.

A two day running festival on the Long Beach Peninsula offering races from kids dashes to a sand marathon. The weekend includes an expo, awards across many categories, and support for local charities.

A 24-hour endurance event at Bowling Green Hot Rods Baseball Park on September 26, 2026, run on a 0.31-mile concourse loop. Solo and four-person relay formats, full overnight aid station, finishers' medals, shirts and awards including a 100..

Chad Lovette Memorial Trail Run/Walk at Cub Creek Park offers timed 5K and 10K trail races, a 5K untimed walk, and a virtual run or walk option, with proceeds benefiting a Relay for Life team.

A 5K trail run or walk at Patriot's Park in Greenville on 09/26/2026 focused on community support for children and families affected by childhood cancer, with registration open 03/02/2026 and a $35 fee.

A looped backyard ultra at Lake Ahquabi where runners complete a 4.167-mile lap each hour until one runner outlasts the rest. The trail is mostly dirt with lake views; overnight runners must carry a headlamp.

Experience the natural beauty of the Big South Fork National River and Recreation Area with a loop trail race featuring 17.5 mile and 10K options primarily on single track terrain.

A 9 km (5.6 miles) trail race in Helena, Montana, with roughly 1,300 feet of elevation change and more than 4 miles of single-track. The 50th edition climbs Mount Helena and returns to Last Chance Gulch with mountain and city views.