Trail Running Calendar United States 2025-2026

The Festivus 100 Miler Trail Run, held in Middleburg, Florida, offers multiple race distances including 100 miles, 50 miles, 35 miles, and 14 miles. This trail running event takes place in early December and is known for its challenging courses set in natural terrain. The race promotes an inclusive..

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 Sawmill Trail Runs, part of the Human Potential Running Series, is an annual trail running event held at Staunton State Park in Pine, Colorado. Offering 50k, 16-mile, and 8-mile distances, the race features a scenic and challenging course through diverse terrain ranging from high grassy meadows..

The Mayhem Night Trail is a nighttime trail running event held at McDowell Mountain Regional Park in Fort McDowell, Arizona. It offers three race distances: 25K, 10 miles, and 5 miles, featuring winding single-track trails with short but steep climbs and descents. Participants navigate the desert te..

The Q50 Races Santa on Trails 5k is a trail running event held at Fontainebleau State Park in Mandeville, Louisiana. Covering a 5-kilometer (3-mile) distance, the race offers participants a scenic course through natural surroundings by the water. Runners receive a cool t-shirt, food and refreshments..

The Mosaic Trail Race is a December trail running event held at Indian Mound Ranch near Liberty Hill, Texas, just outside Austin. It offers multiple race distances including 50K, marathon (26.2 miles), half marathon (13.1 miles), 15K, 10K, 5K, and youth races of 1 and 2 miles. The course features a..

The Krampuslauf is a unique running event held at the Dartmouth Skiway in Lyme, New Hampshire, featuring 5K, 10K, and a challenging 9-hour race. The course begins at the ski lodge base and includes two distinct 5K loops on Holt’s and Winslow sides of the mountain. The 5K race covers Holt’s side, whi..

The Anza Borrego Cuyamaca 50 Mile Run is a scenic ultramarathon held in San Diego County, California. The race covers 50 miles along diverse trails, starting at Sunrise Trailhead and descending into Cuyamaca Rancho State Park. Runners ascend Stonewall Peak, traverse wooded trails near a lake, and fi..

The Amicalola Falls Marathon, held in Dawsonville, Georgia, offers both full and half marathon distances through the scenic Amicalola Falls State Park. The course features two 13.1-mile loops for the full marathon, including a challenging climb up the 605 steps of the Appalachian Approach Trail by t..

Ollie's Ultra is an endurance running event held at Santa Fe Park in Chanute, Kansas. The race offers multiple timed options: 24, 12, 9, 6, and 3 hours, with start times beginning at 8:00 AM on December 6, 2025. The course is a USATF-certified, soft chat trail around the old Safari Golf Course, feat..

The Fall Backyard Burn Trail Run at Fountainhead Regional Park in Fairfax Station, VA, is a popular trail running event held annually, with the 2025 race scheduled for December 7. The course features scenic hiking trails and old dirt roads along the Occoquan Reservoir, offering two distance options:..

The Topo Trail Marathon Races, scheduled for December 7, 2025, at East Fork State Park, offers a variety of running events including a Quarter Marathon (6.55 miles), Half Marathon (13.1 miles), and Full Marathon (26.2 miles). The course consists of a singletrack loop, with participants completing on..

The Pine Mountain Trail Run is a celebrated ultra marathon event held at FDR State Park in Pine Mountain, Georgia, just over an hour from Atlanta. Marking its 45th year in 2025, this "Old School Ultra" features challenging 19-mile and 40-mile races over rocky, single-track trails with rolling hills..

The Hunter S. Thompson Fear & Loathing is an annual ultra running event held in San Francisco, CA, featuring 50K and 50-mile distances. Starting from Twin Peaks, the city's highest viewpoint, runners embark on a single-loop urban course that passes many iconic tourist spots.The race challenges parti..

The Dirty South Trail Races, scheduled for December 7, 2025, in Knoxville, TN, features a variety of events including a Half Marathon, 10K, and a Kids Trail Mile. The race starts and finishes at Mead's Quarry, traversing scenic areas like the Forks of the River Wildlife Area and Ijams Nature Center...

The PPTC Endurance Fest is an ultramarathon event held in Brooklyn, NY, featuring 50-mile and 50-kilometer race options. The race takes place on a looped course within Prospect Park, consisting of 9 or 15 laps of a 3.33-mile loop. Starting and finishing near the Lincoln Road Entrance, the event hono..

The Keepin' It Rural will take place in San Marcos on Sunday 7 December 2025. You can run between 5 and 10 kilometers.

The Last One Standing Ultra Marathon is a self-supported race held in Saint George, Utah, featuring a 6-mile asphalt trail loop along the Mayor's Loop near the Virgin River. Runners complete as many loops as possible within a 90-minute window, with the race continuing through multiple rounds until o..

The Dizzy Horse Backyard Ultra is a unique ultramarathon event where participants run a 4.167-mile loop every hour until they can no longer continue. Set in a winter desert landscape, the race fosters a fun and social atmosphere among runners. The competition continues until only one runner remains,..

The Tame the Tower Trail Challenge is a trail running event held in Mt. Gretna, Lebanon, Pennsylvania, at Clarence Schock Memorial Park. Scheduled for December 13, 2025, it offers two race distances: a 10-mile "T-Rex" and a 5-mile "Ferocious" run.The courses are marked with colored flags—pink for th..