Trail Running Calendar United States 2025-2026

The Augúst is Montana's second oldest footrace, celebrating its 57th edition in 2025. This 5k trail run, known for its flat and fast course, takes place at the Spring Meadow Resources Pavilion in Helena. With a minimalistic approach, the event emphasizes speed and accuracy over frills like t-shirts..

The Night Crawler Endurance Challenge is a unique overnight solo ultramarathon held on Casper Mountain in Wyoming, featuring 4-hour and 12-hour race options. Set at an elevation of 8,100 feet, runners traverse forested trails starting from the Nordic stadium near the Casper Mountain Trails Center. T..

The NoCo Urban Ultra & Relay is a long-distance running event taking place on August 22-23, 2025, along the scenic Poudre River Trail in Northern Colorado. Participants can choose from a 50-mile solo race, a 100-mile solo race, or relay options for both distances, accommodating teams of 2 to 8 runne..

The Fiesta Night Run is an exciting trail running event taking place at the Land Heritage Institute in San Antonio, Texas, from August 22 to 24, 2025. Participants can choose from various distances, including 5K, 17K, 35K, and 50K races, all set against the stunning backdrop of the Texas landscape u..

The Oregon 200 is a challenging 200-mile trail race held in Oakridge, Oregon, organized by Go Beyond Racing. The race features scenic routes along the Middle Fork of the Willamette River and the North Umpqua River, with extensive forested single-track trails, lakes, and rivers. Participants have a 1..

The Midwest States 100 is an exciting running event taking place in the scenic Chequamegon-Nicolet National Forest, Wisconsin, on August 23-24, 2025. This unique wilderness adventure features three race distances: 100 miles, 100K, and 50K, primarily along the iconic Ice Age Trail, a National Scenic..

The Harriman 25K/50K Trail Run, held annually at Harriman State Park near Island Park, Idaho, offers a scenic and well-curated trail running experience. The event features three distances: an 8.1-mile race, a 25K, and a 50K (two laps of the 25K course). Runners enjoy beautiful single-track trails th..

The Fire Ball Half and 4 Mile race takes place at Palo Duro Canyon State Park in Canyon, Texas. The event features a half marathon and a 4-mile race, both set on diverse trail terrain including smooth single track, sand, rock, and technical ascents and descents. The 4-mile course loops through the C..

The Oregon Cascades 100 is a challenging trail race held in Sisters, Oregon, featuring a 100-mile course with approximately 10,700 feet of elevation gain and 11,200 feet of loss. The race starts in Bend and finishes in Sisters, offering scenic single-track trails, rugged terrain, and stunning views..

Hell Canyon is a 5-mile trail race held near Custer, South Dakota, on the scenic Hell Canyon Trail in the Black Hills. The course features a challenging climb to a stunning overlook, followed by a descent through the canyon with spectacular views and several creek crossings that add excitement and r..

The Jug End Loop Ultra is a 6-hour ultra running event held at Jug End State Reservation in Egremont, Massachusetts. Participants run multiple laps of a challenging 4.2-mile course featuring woods, fields, and an apple orchard, with an elevation change of 830 feet per lap, split evenly between uphil..

The Dirty Dozen 50K is a challenging ultramarathon held in New York City’s Forrest Park. Participants are tasked with completing a 50-kilometer race that involves running 12 hilly loops, testing both endurance and mental toughness. Known for its difficulty, the event attracts serious trail runners s..

The Trail Run at Sly Park in Pollock Pines offers a variety of race distances, including 5K, 10K, 8 Mile, Half Marathon, 17 Mile, Trail Marathon, and 50K Ultra, set in the scenic Sly Park Recreation Area. The course winds through Jenkinson Lake’s trails, featuring pine forests and technical sections..

The Arrowhead Half Marathon & 5K is a scenic trail running event held in Arrowhead, Colorado, part of the Vail Trail Running Series. The half marathon covers approximately 13.7 miles with 2,924 feet of elevation gain, traversing trails across Arrowhead, Bachelor Gulch, and Beaver Creek ski resorts,..

The Firebird Trail Races is a challenging trail running event held in Windham, Maine, featuring distances of 13 miles, a marathon, and 50K. The race takes place on technical, rocky, and root-filled single-track trails within Lowell Preserve and North Falmouth Community Forest. Participants start and..

The Mindy Creek Trail Races, held in St. Croix Falls, Wisconsin, offer a variety of trail running events including a marathon, half-marathon, and 10K. The courses feature technical sections, hills, bridges, and scenic trails along single track, gravel, paved, and grass paths.The marathon involves ru..

The Three Rivers Marathon Swim, hosted by Team Forever, is a unique 30K open water swimming event taking place in Pittsburgh, PA. Scheduled for August 23, 2025, this marathon swim benefits the Forever Fund, which supports local families facing costs related to infant cardiothoracic surgery at UPMC C..

The Hyner Half is a challenging 14-mile trail race set in the scenic Sproul State Forest, Pennsylvania, scheduled for August 23, 2025. This event is designed for runners and speed hikers, featuring rugged single-track trails with a strict 4.5-hour time limit. Participants must qualify by listing a p..

The East Fork event in Bethel, Ohio, offers ultramarathon races of 100 miles, 100K, 50K, and 15 miles, set around the scenic William H. Harsha Lake in East Fork State Park. Participants will traverse challenging trails, including mountain bike paths, hiking trails, and creek crossings, with stunning..

The Rio Grande 100 is an exhilarating ultramarathon set in the stunning La Garita mountains of South Fork, Colorado. This challenging race features a course that starts and finishes along the banks of the Rio Grande River, taking participants through diverse terrains, including arid forests and alpi..