Trail Running Calendar United States 2025-2026

The 4 Fore 30 Infinity Backyard Ultra is an endurance running event held in Macks Creek, Missouri. Following the Big's Backyard Ultra format, runners complete a 4.1667-mile (6.7 km) loop every hour, starting at 7:00 AM, with each loop beginning precisely on the hour. Participants must finish each lo..

The Chino Hills Trail Run Series, held in Brea, California, offers trail running enthusiasts a range of distances including 10K, 10-mile, 15-mile, 20-mile, half-marathon, 30K, and a challenging 50K ultramarathon. Set within one of Orange County's premier natural open-space parks, the event features..

The St. Joe Valley Happy Trail Run takes place at St. Patrick's County Park in South Bend, Indiana.This event offers multiple distances including a 1-mile fun run, 5k, 10k, and a half marathon, all on beginner-friendly trails with beautiful scenery. The course features loops: 5k is one loop, 10k two..

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..

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 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 a scenic trail running event featuring 5-mile and 10-mile race options. Set in a 425-acre park along the historic Bull Run, the course offers a mix of hiking trails, old dirt roads, stream crossings, grassy fields, and minimal p..

The Tarrywile Half Marathon, held in Danbury, Connecticut's Tarrywile Park, is known as one of the toughest trail half marathons. The challenging course features nearly 3,000 feet of elevation gain and technical Northeast single-track terrain. Runners enjoy stunning views of Danbury and the park's t..

The Fat Ox Endurance Runs, held at Estrella Mountain Regional Park in Goodyear, Arizona, is a premier ultra-running event featuring multiple race distances including 48-hour, 24-hour, 12-hour, 6-hour, 100-mile, 100K, 50-mile, and 50K races. The event hosts the USATF 24-Hour Championship on a USATF-c..

The Harvest Creek Classic is a 5K running event held at Cauley Creek Park in Johns Creek, Georgia. Featuring a USATF-certified 3.1-mile rubberized trail, the course offers scenic views of the Chattahoochee River, sports courts, athletic fields, and playgrounds. The trail extends across the Rogers Br..

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 Duncan Ridge Trail 50k/30k is a challenging trail race held in the North Georgia Mountains, starting and finishing at Vogel State Park in Blairsville, GA. Known as one of the toughest 50Ks in the Southeast, the course features over 10,000 feet of elevation gain along rugged terrain, including th..

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 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 Golden Gate Trail Classic will take place in San Francisco from Saturday 22 November 2025 to Sunday 23 November 2025. You can run between 15 and 50 miles.

The Camp Chestnut Ridge Trail Race, held annually at the Chestnut Ridge Camp and Retreat Center in Efland, NC, offers a scenic trail running experience through rolling hills and old hardwood forests. The event features two main trail races of approximately 4 and 8 miles on single-track dirt and grav..

The 16 Hour Lock-In is an ultrarunning event held at Carolina Beach State Park near Wilmington, North Carolina. Participants have 16 hours to complete as many 4.5-mile loops as they wish on a relatively flat, groomed trail featuring two hills and varied terrain including dirt, sand, pine straw, and..

Death by 5k Oak Mountain is a unique 24-hour running challenge held at Oak Mountain State Park in Pelham, Alabama. Participants run ten 5k races spaced 2.5 hours apart, starting near the Dogwood Pavilion at the South Trailhead. The course loops counterclockwise from the Lake Trail to Rattlesnake Rid..

The Midland Mountain Trail Series is a festive trail running event held in Harbison State Forest, Columbia, South Carolina. Featuring a full marathon (two laps) and a half marathon (one lap), the course winds through scenic woodlands, creeks, and rolling hills adorned with vibrant fall foliage. The..