Trail Running Calendar United States 2025-2026

The Blood Rock 100 is an ultramarathon event held at Oak Mountain State Park in Pelham, Alabama, featuring multiple race distances including 100 miles, 50 miles, 55K, and 25K. The races take place on the Belcher Tract, a scenic Forever Wild property with trails passing Summit Lake, Demopolis Lake, a..

The Krampuslauf is a unique running event held in Lyme, New Hampshire, featuring 5K, 10K, and a challenging 9-hour race. Set on the Dartmouth Ski Way, the course includes two distinct 5K loops on Holt’s and Winslow sides of the mountain, starting and finishing near a scenic ski lodge. The 9-hour rac..

The Mosaic Trail Race is a family-friendly trail running event held in December at Indian Mound Ranch, a historic ranch near Liberty Hill, Texas, just outside Austin. The race offers multiple distances including 50K, marathon (26.2 mi), half marathon (13.1 mi), 15K, 10K, 5K, and a 1-mile youth run f..

The Backland is a challenging last-man-standing trail race held near the Texas-Oklahoma border at Walnut Creek Resort & Marina in Gordonville, TX. Participants run a 4.5-mile loop called a "land" and must complete each loop within one hour to continue. The race continues hourly until only one runner..

The Calero Trail Run - Winter takes place at Calero County Park in San Jose, California, offering a variety of distances including 50K, trail marathon, 25K, half marathon, 15K, 10K, 5K, mile, and a kids run. The course features challenging single-track trails, hills, dirt paths, oak trees, and panor..

The Peacock Gap Trail Run, hosted by Inside Trail Racing, takes place at China Camp State Park in San Rafael, California. Scheduled for December 6, 2025, the event offers three distances: 10K, half marathon, and 30K, with courses featuring scenic single-track trails, forested areas, and views of Mt...

The Wild in the Woods Trail Race, part of the Big River Trail Series, takes place at Broemmelsiek Park in Defiance, Missouri. Offering both 5-mile (one loop) and 10-mile (two loops) trail race options, it challenges runners with scenic woodland terrain. The event fosters a lively atmosphere with pos..

The Fremont Canyon 28k Trail Run is an exciting running event taking place in Irvine Regional Park, Orange, California. Scheduled for December 6, 2025, this challenging 28k (17.5 miles) course features fire roads with an elevation gain and loss of 2860 feet, making it suitable for experienced runner..

The Santa's Summit 10k is a scenic and challenging trail run held at Bull Run Marina in Clifton, Virginia. The course follows the Bull Run Occoquan Trail, featuring hilly terrain with a mix of out-and-back and one-way sections. Participants can choose between 5k and 10k distances, both chip-timed, a..

The Q50 Races Santa on Trails 5k is a festive trail running event held at Fontainebleau State Park in Mandeville, Louisiana. Scheduled for December 6, 2025, this 5-kilometer race features flat, scenic trails along the park's natural beauty. Participants are encouraged to run or walk in Santa suits a..

The Brazos Bend 100 is a premier trail running event held annually in December at Brazos Bend State Park, just south of Houston, Texas. It features multiple race distances including 100 miles, 100 kilometers, marathon, half marathon, and a women's sub-ultra half marathon. Known as one of the fastest..

Devil Dog Ultras is a challenging trail running event held in Prince William Forest Park near Triangle, Virginia. It offers three race distances: 100 miles, 100K, and 50K. The course features primarily single-track trails with some roots, rocks, and brief technical sections, along with fire roads an..

The Lake Norman State Park Trail Race, held in Troutman, NC, offers two challenging trail running options: a 30K and a 50K. Both races feature smooth, rolling single-track trails with no repeated loops, providing a fresh experience throughout. The 30K course includes about 1,500 feet of elevation ga..

The McDowell Mountain Frenzy is a trail running event held at McDowell Mountain Regional Park in Fountain Hills, Arizona. It offers multiple race distances including 50 miles, 50K, 25K, 10 miles, and 5 miles, catering to both beginners and experienced runners. The courses feature scenic desert singl..

Ollie's Ultra is a USATF certified endurance running event held at Santa Fe Park in Chanute, Kansas. It features multiple timed races including 24, 12, 9, 6, and 3-hour options, where participants run loops of a 2.022-mile soft chat trail on the former Safari Golf Course. The event offers a fully st..

The Colossal Vail 50/50 is a trail running event held near Vail, Arizona, featuring ultra distances of 50 miles, 55K, and half-marathon options, including day and night courses. Starting and finishing at Colossal Cave Mountain Park, the race showcases scenic high desert terrain along the Arizona Tra..

The Tower Tag Challenge is a trail running event held at the iconic Sleeping Giant State Park in Hamden, Connecticut. The race features a simple yet demanding course on the Tower Trail, a mostly smooth carriage road that ascends over 600 feet in 1.5 miles to the park's Observation Tower, offering st..

The Cloudland Canyon 50 is a trail running event held at Cloudland Canyon State Park in Rising Fawn, Georgia. It features multiple race distances including a 50-mile, 50K, 25K, and 5-mile run over a scenic and challenging course. The 50-mile race offers approximately 6,500 feet of elevation gain wit..

The Isle du Bois Trail Run takes place at Ray Roberts Lake State Park near Pilot Point, Texas, about an hour north of Dallas and Fort Worth. This event offers multiple race distances including a 50K, 20-mile, 10-mile, and 4-mile run. The course features a mix of well-groomed single-track trails with..

The Capstone 50K is a trail running event held in St. George, Utah, featuring a scenic 10K loop course with expansive desert views. The race uses a "washing machine" style format where runners alternate running the loop in opposite directions to complete their distance—one loop for 10K, two for the..