Trail Running Calendar United States 2026-2027

Trail races at the Lewis and Clark Trailhead near St Charles include a 13.1 miles half plus separate 8 miles and 5 miles loops. Aid stations offer water and Tailwind and each runner receives a reusable cup at packet pickup.

Dirt Circus Los Angeles is a one day community running festival on August 29, 2026 that pairs a four mile group trail run with an expo of brands, race directors, vendors, food, and a raffle.

A backyard ultra in Bussey, IA where runners complete repeated *4.167 mile* laps each hour for up to 12 hours; laps must be finished within 60 minutes and the last runner to outlast others is the winner. Crew aid is allowed only between lap..

Trail races at Mt. Airy Forest in Cincinnati include 5K, 10K, a 13.1 Miles half marathon and 30K. Finishers get medals, half marathon and 30K include shirts, and the event awards series points across the ATR season.

A community trail event at the Arapahoe County Fairgrounds on 08/29/2026 with a 5K run, a family 5K walk that allows leashed dogs, and a kids 1 mile plus demonstrations, vendors, and a pancake breakfast.

A muddy mix of cross country running and obstacles in Lewiston, Idaho on August 29, 2026. Open to men, women and children, the event can be run casually or as a timed race.

Experience the Midland City Forest trails by day or night at the 10th annual Red Moon Trail Run. Choose from various distances marked by LED guides on a flat loop course with professional timing and finisher medals.

Ocean State Ultra in West Greenwich, Rhode Island (August 29–30, 2026) offers a 100 mile race with a 34 hour limit plus 12 and 6 hour loop events; registration runs March 30 to August 17, 2026.

A scenic loop race on Angel Island offering a Half Marathon (two loops) and a 10K (one loop) with ocean and city views, limited to 400 runners. A chartered ferry from Tiburon is required and ferry fees are included in race pricing.

Experience the Oregon Coast with hilly trail runs at Sunset Bay State Park. Choose from four distances featuring cliffside ocean views, wooded paths, and beach sections in this RRCA sanctioned event.

Road races in Katy, TX offering 5K, 10K and a half marathon on repeat out-and-back loops; registration is via RunSignup and a 3 hour 30 minute course time limit applies.

A mud-free 5 km stadium obstacle race at Citizens Bank Park on August 29, 2026, featuring 20 obstacles, stadium stairs and a finisher medal. The event also includes a kids race, spectator options and team registration.

A night trail run at Estero Llano Grande State Park with 5k, 10k and 10 mile looped courses, youth options, two aid stations, medals for all finishers and overall awards for top three male and female.

Run Like the Wind in Allenspark on August 29, 2026 features a 5K race, a 2K run/walk and a dog jog option. Proceeds benefit The Old Gallery and participating dogs are entered in an amateur dog show.

A high elevation 50 mile mountain race in Ouray, Colorado on August 29, 2026. The course has 23,582 feet of climbing, required pre race volunteer service or a $100 opt out donation, and mandatory tracked location reporting.

Endurance race on one of Cleveland's steepest hills where runners complete as many laps as possible within 1, 3, 6, or 12 hour limits. All registrations and donations go directly to cancer patients through the Nelson Family Foundation.

Backyard ultra at Oak Mountain State Park in Pelham, AL with repeated 4.167 mile loops and about 500 ft of climb per loop. The field is capped at 100 and the Last Zombie Standing format names the final runner to complete a loop as winner.

A roughly 35 mile out and back ultramarathon and separate 10K and 5K take place at Kirkpatrick Memorial Park in Lexington Nebraska, featuring gravel roads through Wiley Canyon, regular aid stations, and required safety gear for early dark r..

A steep 4.75 mile up and down run, hike, or walk on San Anselmo's Bald Hill that finishes downtown with live music and a t shirt. The third annual event benefits local nonprofits and includes town endorsement.

An inclusive trail festival at Northfield Mountain on August 29, 2026 that centers queer and trans runners and allies. It offers a 20k prediction race, an untimed 5k fun run or hike, and a Kid's Run with community-focused prizes.