Trail Running Calendar United States 2026-2027

A community 5K and 1 Mile run/walk on the Pennsy Trail starting and finishing at Sister Cities Park, supporting Sister Cities of Greenfield exchanges with Kakuda, Japan.

A three leg team relay on the Ozark Trail combining trail running, mountain biking and paddling through Mark Twain National Forest. Short and long course options include river paddling along Courtois and Huzzah Creeks toward the Meramec Riv..

A 25K trail loop through Cook Forest State Park featuring a climb to the Cook Forest Fire Tower and riverside singletrack, with three aid stations staffed by local high school teams and packet pickup at Shelter 2.

A trail event at Riley Trails Park on August 15, 2026 offering a half marathon, 10K, and ruck divisions on wooded singletrack. Proceeds support the Egress Endurance Project for people pursuing recovery through endurance sport.

A trail 10k at Lexington Lake in DeSoto, KS, part of a six-race Tour de Trail series. Entries include a $5 donation to Urban Trail Co; courses are roughly 5.5 to 6.5 miles, cupless with water-only aid and finish-line snacks.

Trail races at Cheyenne Mountain State Park feature 5K, 10K and a 25K summit course with about 3,450 feet of elevation gain; the 25K is a Pikes Peak Ascent qualifier and the event raises funds for park trail projects.

Underdown Trail Races The Underdown Trail Races are grassroots trail runs and mountain bike races held on August 15, 2026, at the Underdown Trail system in Merrill, Wisconsin. The running events include a 60k, marathon, and half marathon. T..

This annual community event in Sun Prairie features a 5k race and a kids' fun run, with a course on neighborhood bike paths. Proceeds go directly to support the local high school cross country team.

The Watermelon Wobbler is a 5k trail run/walk/hike through scenic conservation land and a working farm. It features a varied off-road course and supports local agriculture. On-site parking is supplemented by a satellite lot nearby.

A trail 5k at Oak Mountain State Park featuring rugged terrain and significant elevation change. The event takes place on a Saturday in August. Registration is available.

Run a chip-timed 5K or join a scavenger hunt 3K walk at St. Patrick's County Park. Everyone gets a handcrafted medallion, plus there's an egg bake breakfast and door prizes. Leashed dogs are welcome on the walk.

This trail running event at Standley Lake in Westminster, Colorado features five distances from 5K to 50K on 100% dirt paths. The scenic courses offer varied elevation across the different race lengths. Bib pickup is available in Louisville..

This 50k trail run takes you through the Sierra Prieta mountains near Prescott, Arizona. It is scheduled for a late summer date in August 2026.

Climb It For Climate returns to Belleayre Mountain in the Catskills. Runners can tackle a challenging 25K or a shorter 8K mountain course. The event supports environmental causes with donations and carbon offset initiatives.

The Leadville Trail 100 Run is a legendary 100-mile ultramarathon in the Colorado Rockies. With over 15,000 feet of elevation gain and a summit over 12,500 feet at Hope Pass, it's a massive high-altitude challenge. Finishers within 30 hours..

Beat the heat at the Summer Meltdown Half Marathon in O. P. Schnabel Park, San Antonio, on August 16, 2026. Choose from a kids dash up to the 13.1 mile half, enjoy on course aid, finish line snacks, great swag, and festive awards.

Event Overview The Tails & Trails 5K is an annual event taking place on Sunday, August 16, 2026. It features two separate race distances: a 5K run/walk and a Cat Walk 1K. Both events are open to participants of all ages. Pets are welcom..

Experience the high-altitude scenery of Leadville on this 10K course, which follows the first and final miles of the famous LT100 Run. With a single aid station and awards for top finishers, it's a classic mountain run. Registration is open..

The Nitty Gritty Off Road Race at Red Lodge Mountain Resort offers tough, scenic loops on dirt roads and single track. Choose from solo marathons, half marathons, a hot lap, or a team relay. Expect steep climbs, no on course aid, and a welc..

A biannual mountain trail race on Mount Mansfield near Stowe, Vermont, covering about 11 miles and 5,000 feet of climbing over technical and exposed trails. Entry is capped at 70 and requires a recent qualifying time.