Explore the best trail runs in the United States for 2026-2027! Our updated list features 4136 exciting races across the country. Find your next race in the United States below and join the running community at these great events!
Run moonlit singletrack on Casper Mountain at the Night Crawler Endurance Challenge, an overnight time based event with 4 and 12 hour solo and 12 hour relay options. Finish with volunteer made hot breakfast and awards in central Wyoming.
A Last Man Standing race on a **1.1 mile** loop near Inkom, ID, with about 240 ft of elevation gain per lap. Runners must complete each loop within 20 minutes and laps repeat until only one runner remains.
A 100 mile mountain ultramarathon north of Durango, Colorado featuring roughly 19,000 feet of climbing and a 38 hour cutoff. The high alpine course follows the Colorado Trail and reaches 12,438 feet with variable mountain weather.
A Spartan Trifecta weekend at Dillingham Ranch on the North Shore of Oahu offering races from 5K to 50K with obstacles, a kids race, a pre-race workshop, team entries, and a service member discount.
A timed endurance event at Lincoln Park on August 15, 2026, featuring a repeated two mile loop with 18, 12, 6, and 3 hour formats, team competition, and Kids Loopy Races. The race is cupless and supports on-course snacks and food options.
A mid-August trail running weekend in Grandview, Tennessee with looped races from one hour to 24 hours, free tent camping and a glamping auction; proceeds support Flying Pigs Sanctuary.
A backyard ultra at Riverside State Park with hourly loop laps for runners and ruckers, a night out-and-back on the Centennial Trail, and specific ruck weight requirements; the last person standing wins.
A mountain trail race in Alta, Utah covering 7.1 miles and about 2,545 ft of vertical gain, capped at 500 runners. The route climbs to Mt Baldy with aid stations and marked alpine terrain.
A marathon and half marathon on the Medicine Bow Rail Trail near Lake Owen, Wyoming on August 15, 2026. Courses run on a wide gravel trail at high elevation with timed results and aid stations, and proceeds support trail upkeep.
A Scottish Highlander themed obstacle race in Pingree Grove, Illinois featuring 3K family, 5K and 15K heats with 20 to 30 obstacles, plus a torch lit night race and a haunted 5K. Spectator fee on-site is $10 and parking is free.
An obstacle and mud focused 5K at Village Creek Motocross Park on August 15, 2026, featuring mud pits, walls, ropes, monkey bars and 11+ obstacles. Registration options include Value and VIP packages, packet pickup is available the day befo..