Trail Running Calendar United States 2026-2027

A family friendly 5K fun run at Leach Park on May 15, 2026 with a finisher medal, optional foam machine and on site bounce house. Proceeds support Strides for Sunnyside Run Club and shirts are $10.

Obstacle-course races run May 16 and 17, 2026 at Reveille Peak Ranch near Burnet, Texas. Courses move through Texas Hill Country across granite outcrops, dry creek beds and rolling hills with Sprint, Super, kids and endurance formats.

A two-day Spartan Trifecta Weekend at Big Bear Mountain Resort featuring Sprint, Super and Beast obstacle races at high altitude with long climbs and descents; kids races and spectator access are also available.

Trail race at Palisades Park in Oneonta, AL on May 16, 2026 with 5K, 10K, 15K and 20K options. Climbers who sign a waiver can retrieve a finisher medal at the tower; proceeds support OHS Cross Country and Palisades Park.

Trail runs at Skyline Wilderness Park in Napa offer distances from 10K to 50K with steep Rim Rock climbs and valley views. Aid is touchless and parking is included with registration.

A rural ultramarathon in Enterprise, KS featuring 50K, 100K and a 100 Mile race on gravel roads and a rail trail with a manned aid station per loop. Pacers allowed from loop 6; shirts, awards, and finisher buckles are included.

A Last Person Standing ultrarun on a farm near Arena, WI, run on a 1 to 1.25 mile loop with about 250 to 300 feet of climbing per lap. The course changes yearly, reverses every four hours, and continues until one runner remains.

A Spartan obstacle weekend at Southington Off Road Park near Cleveland with races from a kids course to a 50 km Ultra across wooded, rugged trails. The Trifecta option allows completing Sprint, Super and Beast in one weekend.

A timed backyard ultra at Butterfield Trailhead using a 4.167 mile loop repeated hourly in 4, 8, or 12 hour formats, with live lap timing, finisher awards, and a finish area set up for friends and family.

Run for Amma is a charity trail event on May 16, 2026 at Skyline Ridge Open Space Preserve near Los Gatos. Multiple distances from 10K to 50K are offered and all registration proceeds support UCSF cancer research.

An inaugural trail ultramarathon in Napa offering a 50 mile solo and a two-person 50 mile relay over two long loops through Skyline Wilderness Park and Suscol Headwaters, run as a cupless event with four aid stations and limited crew access..

A 5K obstacle course at Rocky Mount Sports Complex with mud pits, 15 plus obstacles, and a one mile kids race. Proceeds support local college scholarships and registered racers receive a shirt, medal, and goodie bag.

Born To Run Ultra Marathon in Los Olivos CA on May 16, 2026 offers distances from 10 miles to 100 miles plus 3- and 4-day formats; registration opens December 1, 2025.

Experience the natural beauty of Mueller State Park with various trail distances from a 10k to 12 hour timed ultra events. Choose between traditional distance loops or a unique randomized format determined by colorful draws.

Test your endurance at the Armed Forces Endurance Run. Choose your challenge from 6, 12, or 24 hour timed distances. This event supports community charities.

Mountain trail races in Burnsville, NC offering 50K and 25K courses with significant climbing and revised routes after Hurricane Helene. The event includes mandatory shuttle service, race swag, free photos, and a strict warning that it is n..

Trail races at O'Neill Park in Trabuco Canyon, California on Saturday, May 16, 2026. Distances range from 10k to 50k; registration closes May 1 and entries are nonrefundable with a rollover option if canceled for weather or fire.

Trail races around Drake Well Museum and Oil Creek State Park with 2, 5, 13 and an 18-mile stacked option; awards, shirts included, and proceeds benefit Friends of Drake Well.

A family-focused running event in Buffalo Park on May 16, 2026 featuring chip-timed 10K and 5K trail races, a stroller friendly 1 mile stroll, and a free Children's Churro Chase. Proceeds benefit Hope Pregnancy Resource Center.

Obstacle course races on rolling motocross terrain in Morganton NC, featuring creek and pond crossings, a dirt bike track, and distances from 1 to 6 miles, plus elite, open, and youth Cub Crawl divisions.