Trail Running Calendar United States 2025-2026

The Trails & Tacos 15k/5k is a running event held at Erwin Park in McKinney, Texas. It features two race distances: a 15k and a 5k, both set on scenic trails within the park. The event offers a friendly and encouraging atmosphere, supported by aid stations with trail snacks and enthusiastic voluntee..

The Dizzy Fifties is a 50K trail running event held at Monte Sano State Park in Huntsville, Alabama. The course consists of three loops, each just over 10 miles, starting and finishing at the Bikers Pavilion. With approximately 3,000 feet of elevation gain, the race offers a challenging yet accessib..

The Falcon Crest Winter Trail Challenge is a scenic trail running event held in the foothills of El Dorado Hills, California, near Folsom Lake. The race offers multiple distances including 5K, 10K, 15K, half marathon, 30K, and a trail marathon, all featuring mostly single-track dirt and rocky trails..

The Looking Glass 100k is a highly scenic ultramarathon held in Pisgah Forest near Asheville, North Carolina. Covering approximately 62 miles with around 13,600 feet of elevation gain and loss, the course features a challenging single large loop around the iconic Looking Glass Rock. Runners traverse..

The Bad Beard Events River Gorge Trail Race, held near Chattanooga, Tennessee, offers three challenging distances: 6.5, 10.2, and 20 miles. Set in the scenic Prentice-Cooper Wildlife Management Area, the course features technical single-track trails through Mullens Cove and Pot Point loops, showcasi..

Cohutta Madness is an endurance trail running event held near Chatsworth, Georgia, featuring timed loop races around Lake Conasauga, the highest lake in Georgia. Participants can choose from 4-hour, 8-hour, or 12-hour race options, running as many miles as they wish within their chosen time frame. T..

The Dirty Duel Trail Race, held at Robinette’s Trails in Grand Rapids, Michigan, is a challenging and unique 5K event offering two course options: the Short & Brutal (3.1 miles) featuring steep climbs, roots, and off-trail running, and the Long & Difficult (3.4 miles) with more mileage, twists, and..

The Louisville Trail Race, held annually in Louisville, Colorado, features a half marathon, 10K, and 5K on scenic front range trails. Celebrating its 12th year, the event offers mostly flat courses with a notable challenging hill near the final mile, providing stunning views of the Flat Irons and fr..

Run The Ritter is a trail running event held in Lakeville, Minnesota, featuring 3-mile, 5-mile, and 10-mile distance options, along with a Canicross division for runners with dogs. The course consists of a 5-mile loop with rolling hills, a mix of wide off-road trails, some gravel road sections, and..

The Baystate Dirty Dog Trail Run-Ruck-Walk 5k, held in Berkley, Massachusetts, is a rugged outdoor event honoring military personnel, first responders, and their K-9 companions. Participants can run, ruck with weighted packs, or walk a challenging 5k trail through scenic natural landscapes. The even..

The Li'l Rhody Runaround Trail Run is held at Burlingame State Park in Charlestown, Rhode Island. It features two trail running events: an 8-mile and a 4-mile course, both winding around the scenic Watchaug Pond. This race is part of the WTAC Fall Trail Race Series, offering a 10% discount for parti..

The Fall Backyard Burn Trail Run at Hemlock Overlook in Clifton, VA, is part of a series featuring 5- and 10-mile trail races on scenic Northern Virginia trails. The course runs through Hemlock Overlook Park, a 425-acre area along Bull Run, offering a remote natural setting close to Washington D.C...

The Tarrywile Half Marathon, held in Danbury, Connecticut's Tarrywile Park, is known as one of the toughest trail half marathons in the region. Covering nearly 3,000 feet of elevation gain, the course features technical Northeast single-track trails with rocky, rooty, and hilly terrain. Runners enjo..

The Fat Ox Endurance Runs, held November 21-23, 2025, take place at Estrella Mountain Regional Park in Goodyear, Arizona. This ultra-running event features multiple race options including 48-hour, 24-hour, 12-hour, and 6-hour fixed-time runs, as well as fixed-distance races of 100 miles, 100K, 50 mi..

The Fall Fling 400 is an annual trail running event hosted by the CT Trailmixers at YMCA Camp Sloper in Southington, Connecticut. It features two main races: a 400-minute timed event where participants run as many loops as possible on a roughly two-mile trail course, and a 4-mile race consisting of..

The Tupelo Trail Shuffle is a trail running event held at Trace State Park in Belden, Mississippi, featuring 10K and 20K distances. The course runs on mostly single-track trails through hardwood timber and old growth pines, partially alongside Trace State Lake, showcasing beautiful fall foliage. The..

The Tuckahoe 25K is an annual trail running event held in Queen Anne, Maryland, featuring a 25-kilometer (15.5 miles) course primarily on single-track and horse trails. The terrain includes runnable hills, some rooty and muddy sections, but is not overly technical, making it suitable for both newcom..

The Dinosaur Valley Endurance Run, held at Dinosaur Valley State Park in Glen Rose, Texas, offers a challenging trail running experience with distances of 100 miles, 100K, 50K, 25K, and 5 miles. The course features a mix of terrain including soft dirt, rocks, and roots, with gradual hills and techni..

The Last of the Felascans is a challenging backyard ultra held at San Felasco Hammock Preserve State Park in Alachua, Florida. Participants run a 4.167-mile loop every hour on a trail course by day and a dirt road by night, with no pavement throughout. The race continues until only one runner comple..

The Darrington Single Track Trail Challenge is a trail running event held near Pilot Hill, California, along the scenic shores of Folsom Lake. The race offers multiple distances including a 36-mile, 18-mile, 10K, and 5K, catering to a variety of runners. The course features stony dirt paths that tra..