Trail Running Calendar United States 2025-2026

Lehigh Gap Nature Center hosts a 10k trail run and a 2 mile scramble in Slatington, Pennsylvania. The loop starts and finishes at the Nature Center, weaving through the center’s trails and key segments of the D&L Trail. Runners enjoy a flat start, a short steep ascent on the Bobolink Trail, fern-lin..

Midstate Massive Ultra Trail is a UTMB Index endurance race held October 11–12, 2025, spanning New Ipswich, NH, and central Massachusetts with border crossings into New Hampshire and Rhode Island. Runners choose from three point-to-point options—100 miles, 50 miles, and 50 kilometers—following the A..

Boulder XC Series Meet 1 is a family-friendly cross-country event held at Valmont City Park (South) in Boulder, Colorado (5110 Valmont Rd). The meet offers three distances: 1K for younger runners, 3K for those up to 16, and a 5K open race, welcoming participants of all ages and abilities. It’s the f..

The 4th Annual Fall Classic takes place on Saturday October 11, 2025, at PLU Meadows Disc Golf Course, 754 124th St S, Tacoma, WA 98444. The race offers 1K Kids run and a 5K for participants, with youth and high school cross country races following. The course is described as mostly flat with a few..

Snap Dragon is a clothing-optional running event held in Noel, Missouri, on Sunset Mountain. Open to participants 18 and older, the course features one-mile laps around the sunlit mountain, with the last runner on each lap being eliminated. A final race-off determines the overall winner in a jackpot..

The Anderson Lake Backyard Ultra takes place at the Anderson Lake West State Forest Campground in Gwinn, Michigan. Runners complete a 4.167-mile loop every hour on the hour for 24 loops; the winner is the last runner, with ties decided by final lap time. The atmosphere prioritizes fun and camaraderi..

Bone Dash 5K & Monster Mile Fun Run takes place at Lake McBride Trail and Timber Dome Lodge in Solon, Iowa. The event offers two races: a Bone Dash 5K and a Monster Mile one-mile run. The courses start together at Timber Dome Lodge; 5K runners head onto the paved Lake McBride Trail while the 1-mile..

The Mammoth at High Hope Ranch and Retreat Center in Glen Rose, Texas is a multi-distance trail race offering 100K, 50K, 25K, 10K, 5K and the Mighty Mammoth 1K Fun Run. The course uses two loop options—a 3.5-mile loop and a 7-mile loop—that together form a 10.5-mile lap through the Hill Country on H..

Wolf Lake 5K Trail Run/Walk is staged at the Hamburg Fitness Center & Camp on 8540 Hamburg Rd. in Brighton, Michigan, and takes place on the Wolf Lake Trails. This community event offers a 5K trail course for runners and walkers, with a festive, family-friendly atmosphere that encourages Halloween c..

The Custer Trail Walk/Run/Roll is a family-friendly community event held at Clark at Keller Lake in Grand Rapids, Michigan (2431 Forest Hill Ave SE). Participants choose between a scenic 5K route—three loops around the trail—or a gentle 1-mile loop suitable for residents and kids. A remote participa..

The Rick O'Donnell Memorial 5 Mile Trail Run & Ultra Challenge takes place at Milkhouse Brewery at Stillpoint Farm in Mount Airy, Maryland. In its 13th year, the event offers three ways to test endurance: a single 5-mile trail loop, a 4-hour challenge, and an 8-hour ultra challenge. The hilly course..

The Land of Light 100k is a unique human-powered race held in Norway, Maine, featuring a combination of running and cycling across six distinct trail systems. The event covers a total of 100 kilometers, with 25k of running and 75k of cycling, starting at Virgil Parris Preserve. Participants navigate..

West Side, Best Side 5K Trail Run at Shawnee Lookout is the final race in the Dirt Days Trail Series, held at Shawnee Lookout Hamilton County Park in North Bend, OH. The course begins and ends at Waterhole Meadow Shelter and combines the Blue Jacket (1.3 miles) and Little Turtle (2.0 miles) nature-t..

Green Monster Trail Challenge in Wellsboro, PA, in the Tioga State Forest north of PA Grand Canyon, offers 15K, 25K and 50K options for runners and hikers. The course features rolling single-track, steep ascents, numerous stream crossings and technical descents through rugged mountain terrain. Eleva..

The KING of Eagle Mountain Trail Challenge takes place in Fort Worth, Texas, at Eagle Mountain Park. The race offers a 3.3-mile loop with a climbing route through the hilliest sections of the trails, available in multiple endurance formats. In 2025 the event emphasizes cooler conditions, with a post..

Enchanted Forest Sanctuary 5K/3K Trail Run takes place at the Brevard County Enchanted Forest Sanctuary in Titusville, Florida. The event features a 5K Run/Hike, a 3K Run/Hike, and a Kids Fun Run for ages 1-12. The sanctuary spans 480 acres with hiking trails, an environmental education center, and..

Race For Open Space is a West Bend, Wisconsin trail running event at Cedar Lakes Conservation Foundation's Fox Hill Nature Preserve. It offers a 5K trail run, a 10K trail run (two loops), a 1-mile trail walk, and a 5K for ages 18 & under. The course traverses deciduous forest, restored prairieland,..

The Fred Torres Memorial 5K is the 12th annual charity race at Garrett Mountain in Woodland Park, New Jersey. The live event features a 5K run on a championship cross-country course and a 2-mile walk, with a virtual 5K option for remote participants. Family-friendly events include a Tot Trot and a 1..

The John Lawson Tamalpa Challenge is a three-race cross-country event held at Miwok Meadows in China Camp State Park, San Rafael, California. Each 4.2-mile course follows rolling single-track trails with about a quarter-mile on asphalt, starting near the Miwok Meadows gate and finishing in the Miwok..

The Fallasburg 5K Trail Race will take place in Lowell on Sunday 12 October 2025.