Trail Running Calendar United States 2025-2026

The Last Chance Ultra is an exciting running event taking place on December 6-7, 2025, in Springfield, MO. This fourth annual race offers participants the opportunity to complete various distances, including a 100 Miler, 50 Miler, 50K, and a 10 Miler. It serves as a perfect way to log those final mi..

The Caloosa Fest 5K is an exciting running event taking place in Alva, Florida, featuring a scenic trail run. Scheduled for December 6, 2025, this festival includes not only the 5K race but also ultra races of 25K and 50K, along with adventure races. Participants can enjoy various activities, includ..

The Calero Trail Run - Winter is an exciting trail running event held at Calero County Park in San Jose, CA. Participants can choose from various distances, including a 50K, Trail Marathon, 25K, Half Marathon, 15K, 10K, 5K, and a Kids Run. The course features scenic single tracks, hills, and dirt pa..

The Over The Hill Track Club hosts the High Desert Ultra, featuring 50K and 30K races in Ridgecrest, California. Celebrating its 37th year in 2024, this annual event invites ultra runners from Southern California and beyond to explore the scenic desert trails. The club, a 501(c)(3) organization, aim..

The Sawmill Trail Runs, part of the Human Potential Running Series, is an annual trail running event held at Staunton State Park in Pine, Colorado. The event features three distance options: a 50k, a 16-mile, and an 8-mile race, catering to various skill levels. The park's stunning landscapes, rangi..

The Jackson County 50-50 Ultramarathon will take place in Brownstown on Saturday 6 December 2025. You can run between 10 and 100 kilometers.

The Crooked Creek 5K Trail Challenge is an exciting running event taking place on December 6-7, 2025, at the Harry S. Frazier Scout Reservation in Shepherdsville, KY. This unique 5K race offers participants the chance to navigate through over 1,000 acres of scenic trails, featuring rolling hills and..

The Crooked Creek Ultra Trail Race is an exciting running event held at Camp Crooked Creek in Shepherdsville, Kentucky, featuring a challenging 12.7-mile loop with over 2,300 feet of elevation gain. Scheduled for December 6-7, 2025, participants can choose from various distances, including 100 miles..

The Mayhem Night Trail is an exciting running event taking place in Fort McDowell, AZ, featuring 25K, 10-mile, and 5-mile courses. This race is part of the Fall Sunset Series and offers a unique night trail experience, allowing participants to share the course with 50-mile runners from the earlier M..

The Conquer is a challenging backyard ultra marathon held in Dawsonville, GA, at Amicalola Falls State Park. Participants must complete a 4.1-mile loop every hour, with a total elevation gain of 1,065 feet, until only one runner remains. Each competitor carries a $100 bill throughout the race, which..

The Thumbs Up Vertical Challenge is an exciting running event taking place in Estes Park, CO, featuring an 8-hour ascent on the Thumb Open Space trail. Participants will navigate a 1km out-and-back course with a 540ft elevation gain, collecting poker chips at the turnaround to determine their standi..

The Old Fort Strong Endurance Festival will take place in Old Fort from Saturday 6 December 2025 to Monday 8 December 2025. You can run 12 hours.

The Tower Tag Challenge is an exciting trail running event held at Sleeping Giant State Park in Connecticut, known for its stunning views and diverse trails. Participants can choose between 4-hour and 8-hour options, racing up and down the Tower Trail, which ascends over 600 feet to the Observation..

Ollie's Ultra is an endurance running event taking place at Santa Fe Park in Chanute, Kansas. Participants can choose from various race durations, including 24, 12, 9, 6, and 3 hours, all on a USATF certified course. Runners will complete a 2.022-mile loop, with only full loops counting towards thei..

The Brazos Bend 100 is a premier trail running event held at Brazos Bend State Park, just south of Houston, Texas. Scheduled for December 6-7, 2025, it features multiple race distances, including 100 miles, 100 kilometers, a marathon, and a half marathon. The 100-mile race serves as a qualifier for..

The Loup Garou Trail Run, taking place in Ville Platte, Louisiana, offers a unique running experience through the scenic landscapes of cypress swamps, hardwood forests, and piney woods. Participants can choose from various distances, including 100, 60, 40, and 20 miles, all set on a challenging sing..

The Arctic Frog Run in Libertyville, IL, is an exciting endurance running event featuring multiple race distances: 50K, 25K, 15K, 10K, and 5K. Set against a scenic backdrop, the course includes a mix of pavement, wooded trails, and crushed limestone paths along the Des Plaines River. This unique win..

The Krampuslauf is a unique running event held at the Dartmouth Skiway in Lyme, NH, featuring 5K, 10K, and a challenging 9-hour endurance race. Participants will navigate scenic mountain trails, starting at the ski lodge and tackling both Holt's and Winslow sides of the mountain. Runners can earn me..

The Fall Backyard Burn Trail Run at Fountainhead Regional Park in Fairfax Station, VA, is a popular trail running event scheduled for December 7, 2025. Participants can choose between a 5-mile or a 10-mile course, both featuring scenic hiking trails and dirt roads along the Occoquan Reservoir. The e..

The Hunter S. Thompson Fear & Loathing event is a renowned ultra-running race held annually in San Francisco, CA, celebrating its 41st edition in December 2025. Participants can choose between a 50K and a 50-mile course, with no entry fee required.The race features a mix of city streets and parallel..