Trail Running Calendar United States 2026-2027

Timed trail events of six, twelve and twenty four hours on a 3.55 mile loop with one aid station. Full loops count and a short out and back opens in the final 30 minutes to add mileage.

Point to point and out and back ultramarathon options in Michigan's Thumb with 50 Mile, 50K, relay, ruck and virtual divisions. The mostly dirt course has modest elevation gain and staffed aid stations.

A women only trail race at Lake Mohegan in Fairfield CT offering 5K, 10K and a 4 hour loop option. The event features finisher medals, podium awards, post race food and supports a local non profit.

Trail marathon-plus, half marathon, and relay on private Mazama-Twisp terrain with alpine views, sustained climbs, and flowered meadows.

Atlanta Hurricane Heat on Apr 24, 2027 at Bouckaert Farms offers 4 hour and 12 hour formats. The 12 hour format includes 25 challenges and requires participants to be 18 or older; the event runs alongside a Tough Mudder weekend.

A 100 mile ultramarathon along the C&O Canal towpath near Knoxville, Maryland, featuring one ~40 mile loop and two ~30 mile loops beside the Potomac and multiple aid stations with volunteer support.

No Foolin' Foot Race in San Carlos on April 24, 2027 offers 15K, 10K, 5K and a 1K kids trail course across Big Canyon, Eaton and Pulgas Ridge, with proceeds supporting local open space trail maintenance.

The TARC Spring Classic takes place April 24, 2027 in Jericho Town Forest, Weston, MA, with 10K, half marathon, marathon and 50K looped trail options, a single aid station, marked course, and a cupless race format.

Two trail events, 25K (about 17 miles) and 10 miles, on technical singletrack and crushed gravel around the Shawangunk Ridge near Ellenville NY. Routes feature steep climbs, two aid stations, a six hour cutoff and a 150 runner cap.

Squatchywaska Mountainfest in the Shawangunk Ridge on April 24, 2027 features a technical 25K and a 10 mile lollipop course with steep climbs, rocky singletrack, two aid stations, and a six hour cutoff.

Trail races at Jonathan Dickinson State Park in Hobe Sound, FL, featuring a 50K, a Heavy Half and a kids' free fun run across dunes, wetlands and varied natural communities; entries for longer races are limited and no refunds are allowed.

The Gladiator Challenge will take place in Tallahassee on Saturday 24 April 2027. You can run 5 kilometers.

A 5K obstacle run at Hobb's Grove in Sanger, California on April 25, 2027, with Adult and KIDZ Family waves. Waivers and photo ID are required and spectators pay a cash fee for festival area access.

The Leatherman's Loop will take place in Cross River on Sunday 25 April 2027. You can run 10 kilometers.

A 100-mile loop around Lake Cuyamaca and nearby parks on mostly single-track trails, the San Diego 100 features about 15,600 feet of climbing, a 32 hour cutoff, crewed and Solo divisions, and strict qualification and volunteer requirements.

A multi-person team relay on April 30, 2027, starting at the Pisgah Ranger Station and covering over 200 miles in 36 legs. Teams of 6, 9, or 12 run with professional timing, on-course support, and a finish line gathering.

A multi-distance ultrarun weekend at the Bonneville Salt Flats near Wendover Utah featuring 100 mile, 106.5K, 50 mile, 50K plus new 10K and 5K fun runs. Courses cross salt flats, mud flats and island-like peaks with preapproved alternate ro..

A three-day stage race near St Louis linking Greensfelder and Rockwoods trails with roughly 21 mile, 26 mile and 25K stages, technical singletrack and creek crossings. The event is cup free and partnered with the Trail Mix Fund.

A last person standing endurance race in York, PA where runners repeat hourly loops until one remains. Entries include a designated parking and crew area, an event shirt, and a certified distance card.

Trail run and hike at Camp Spearhead in Pleasant Ridge County Park offering a 13.1 mile race and a 10 kilometer option. The course is a shaded 10K loop with one aid station per lap and proceeds support Camp Spearhead.