Trail Running Calendar United States 2025-2026

The Naperville Trails Half Marathon & 10K is a scenic running event taking place in Wheaton, Illinois, on September 6, 2025. Participants can choose between a half marathon and a newly introduced 10K distance, both of which traverse the beautiful crushed limestone trails of the Danada Forest Preserv..

The HRCA Wildcat Mountain Trail Races, scheduled for September 6, 2025, in Littleton, Colorado, features a variety of events including a 10K, 10M, and a Kid's Race. The race begins at the Douglas County East/West trailhead and takes participants through the scenic HRCA Backcountry Wilderness Area. R..

Beat the Blerch is a unique running event featuring a 5K, 10K, half marathon, and full marathon, inspired by a comic from The Oatmeal. Scheduled for September 6, 2025, in Carnation, Washington, the race takes place at Tolt MacDonald Park, offering a scenic flat course through lush forests along the..

The Ravine Trail Run features both 5K and 10K races set in the scenic trails of Cottage Grove, Minnesota. Scheduled for September 6, 2025, the event takes place on a moderately challenging 3.2-mile loop that includes hills, valleys, and diverse terrain. Participants can enjoy a well-marked course wi..

The Mendocino Running Festival, held in Mendocino Woodlands Park, California, offers a unique outdoor running experience amidst ancient redwoods. The event features a looped 6-mile trail course with 875 feet of elevation gain, crossing log bridges and streams. Participants can choose from a 12-hour..

The Groton Forest Trail Run, organized by Central Vermont Runners, features a marathon, 25K, and 10K trail running events set in the scenic Boulder Beach State Park in Groton, Vermont. Scheduled for September 6, 2025, this event promises a challenging and enjoyable experience for runners of all leve..

The Megunticook Trail Festival in Camden, Maine, features three challenging trail races set in the scenic Camden Hills State Park. The events include the 50K ultramarathon, the Halfast 20K, and the Wicked Tough 10K, each offering unique experiences of the area's rugged terrain and stunning views of..

The Smallfoot Trail Fest will take place in Mifflinburg on Saturday 6 September 2025. You can run 3 miles.

The Tartarus Backyard Ultra is a challenging endurance event held at Camp 7 in Riverside State Park, Spokane, WA. Participants can choose between a running race or a rucking race, both following the traditional backyard ultra format where competitors complete 4.1667-mile loops (or 2.2 miles for ruck..

The Pine Creek Challenge is a scenic trail running event held in Wellsboro, Pennsylvania, featuring multiple race distances including 100 miles, 100K, 50 miles, and a marathon. The course runs along the Pine Creek Rail Trail, passing through the Grand Canyon of the East, a National Natural Landmark..

Devil on the Divide is a challenging trail race held in Empire, Colorado, featuring 50K and 22K courses. The event offers breathtaking views of Clear Creek County and the Continental Divide, with participants reaching altitudes over 13,000 feet and experiencing significant elevation gains—over 6,500..

The Prairie On Fire Backyard Ultra is an exciting running event set to take place at Koteewi Park in Noblesville, IN, on September 6, 2025. This unique race format challenges participants to complete a 4.167-mile loop within an hour, with runners continuing to line up for additional loops until only..

The Hurricane 100k is a challenging trail running event held in Hurricane, West Virginia, featuring a 62-mile course on the scenic Meeks Mountain Trails. Participants can compete solo or as part of a three-person relay team, with each lap covering 10.3 miles of single-track mountain terrain. The rac..

The FallApple event in South Orange, NJ, is a diverse running competition scheduled for September 6, 2025. Participants can choose from various distances, including a 5K, 10K, half marathon (13.1 miles), marathon, 50K, and 50 miles. The course features a mix of fire roads, single-track trails, hills..

Backcountry Rise is a unique trail running event held in the stunning Mt. Margaret Backcountry, part of the Mount St. Helens National Volcanic Monument in Toutle, WA.Participants can choose from three challenging courses: a 50K, a 20-mile race, and a half marathon, each offering breathtaking views o..

The GOAT Run, taking place in Port Angeles, WA, is an exciting trail running event featuring a half marathon, marathon, and 50K race. Set against the stunning backdrop of Olympic National Park, participants will traverse the scenic Olympic Adventure Trail, culminating at the beautiful Lake Crescent...

The Black Squirrel Half Marathon is a challenging 13.5-mile trail race held in Lory State Park near Fort Collins, Colorado. Featuring approximately 2,000 feet of elevation gain and loss, the course offers a scenic perimeter tour of the park with stunning views of Horsetooth Reservoir, Fort Collins,..

The Bad Beard Events Oli Kai is a trail running race held at Reflection Riding Arboretum and Nature Center in Chattanooga, Tennessee. Participants can choose from 3, 6, or 9-hour options, running or walking a 2.1-mile loop with about 190 feet of elevation gain. The event is suitable for all skill le..

The Germantown 50k, scheduled for September 6, 2025, is a premier ultra trail race hosted in Germantown, Ohio. Participants can choose between the traditional 50k race and a new two-person relay option, where team members complete two loops each. The scenic course features a mix of cedar forests, pr..

The DoWackaDo Trail Runs & Gravel Rides take place at Sandy Sanders Wildlife Management Area near Erick, Oklahoma. The event features multiple trail run distances on Saturday, including 5, 10, 20, 30, 40, and 50 miles, with courses consisting of loops on graded ranch roads through canyonlands. Aid s..