Trail Running Calendar United States 2026-2027

Cornell Days 5k and 1 Mile Fun Run/Walk is a family friendly event at Clinton Keith Mills Memorial Park with an out and back county road course and a postrace breakfast cookout.

Trail races and a kids run at Eagle Creek Campground near Yellowstone on 12 September 2026. Courses include a 9k with 1000 feet of climb, a 5k with 400 feet of climb, and an untimed 5k walk.

A mountain road race in Jelm, Wyoming with a 10 mile out and back on jeep roads and a 50k that repeats the loop three times. The course gains over 2,000 feet and reaches the Infrared Observatory above 9,600 feet.

A 7 mile out and back on the Guild-Hardy Trail near Chattanooga on September 12, 2026, with a 3.5 mile climb to a boulder turnaround and a 3.5 mile descent back. The field is limited to 100 and parking is restricted.

A women only 5K obstacle mud run at The Master's Motoplex in Gaston, South Carolina on September 13, 2026. The course features 18 plus obstacles and welcomes participants aged 7 and older to run, jog or walk with a teamwork focus.

An obstacle course race at Indiana Dunes National Park on September 13, 2026, featuring 10k, 5K and a K9 3.1-mile event. The course uses varied landscapes to reflect terrains associated with military service.

Experience the rugged beauty of northwest Connecticut at Macedonia Brook State Park. Featuring single track trails and views of the Catskill Mountains, this event offers 12K, 25K, and 50K distances for trail runners.

A community fundraiser at Mendon Ponds Park with in-person and virtual 5k options plus a Trail X Challenge and a 10k combo. The event supports ROCovery and includes event swag and packet pick up dates.

Trail races at Chewacla State Park on September 13, 2026 offer 5K and 10K singletrack loops. The event supports Valley Rescue Mission and includes race shirts, finish awards, aid stations, and a park day use fee.

A marathon and half marathon near Snoqualmie Pass featuring a packed gravel rail trail, a run through the Snoqualmie Tunnel, and about 1,000 foot net downhill. The marathon is USATF certified and a Boston qualifier.

Konza 25K & 10K takes place September 13, 2026, at Konza Prairie Nature Trail in Manhattan, KS. The event includes 25K, 10K and a virtual race with tiered registration fees across three periods.

A trail stage race on the Knobstone Trail with 5 mile, Half Marathon, 18 miler and a new 50K option; proceeds support the Suicide Awareness Mission and local scholarship grants.

A September mountain race at Echo Lake State Park offering a five mile course and a half marathon that climbs over 4,300 feet of vertical. Courses run on granite ledges and exposed ridges with remote aid stations.

Experience a historic run at Pompey’s Pillar National Monument with an RRCA qualified 5k or a relaxed 1 mile walk. Support local history and preservation while enjoying the scenic Montana landscape this September.

A 5K and 10K trail run in Letchworth State Park on September 13, 2026 featuring woodland courses, finisher medals, a post-race celebration at Trailside Lodge, and timed results with downloadable certificates and photos.

An inaugural trail festival at Greek Peak Mountain Resort in September 2026 featuring multiple mountain races, a kids mile, and a dog friendly 5k. Night races require headlamps and an Uphill 1k climbs the Iliad slope.

A fall mountain event on September 13, 2026 featuring a 25K loop past Crystal Mill, an 8 mile Quarry Climb, and a 2.5K kids run, with a post-race BBQ and proceeds benefiting Marble Charter School.

Support service members and their families at Reynoldsburg Civic Park. Choose between a 5k obstacle course with mud and walls or a stroller friendly paved 5k run through the park grounds.

A trail running event at Fort Valley Trailhead in Flagstaff offering 6K to 50K routes through pine and aspen forest, looped courses with aid stations up to seven miles apart, and race shirts, medals, and snacks for finishers.

Big Brad Ultras at Bradbury Mountain State Park offers 25K and 50K options on a 15.5 mile single track loop. The course features technical terrain, multiple aid stations, drop bag access, and significant elevation gain.