Trail Running Calendar United States 2026-2027

Scenic single track awaits at the Backside Trail Marathon and Half in Louisville's Seneca and Cherokee Parks. The marathon is two loops on gently rolling trails, so wear trail shoes and expect slower times than on roads.

Join the 14th annual Aut2Run at CSU Channel Islands Apr 26, 2026 with races from 15K to a mile, a Fun K and virtual options for all ages. All proceeds support Autism Society Ventura County and promote inclusion.

Join the Philosopher’s Way Trail Runs in Chapel Hill with 10 mile and 7k options on April 26 or self timed runs through May 3. Run marked single track and gravel routes while supporting Carolina North Forest restoration.

Tackle the Expedition 12K at Lewis and Clark Caverns in Whitehall Montana for a scenic but demanding trail with sweeping Jefferson Valley views. Expect big climbs and descents, chip timing, swag, post race brunch, awards and raffles.

Join the AdironDUCK 5K in Croghan for a fun untimed trail run, walk or bike ride with a pancake breakfast included. Casual and family friendly, helmets required for cyclists and shirts may be available on race day.

Join the Patriot Power 5K on April 29, 2026 in Reading, PA to support veterans with proceeds to Team RWB. Enjoy vendor tables, bib and shirt pickup, a finisher medal and a post race dinner and beer, or join virtually with a mailed kit.

Join SHEastern States Weekend, a three day women's trail camp in Lock Haven PA with guided night and long runs, evening clinics, cabin lodging, meals and group transport. Run in no drop groups and recharge with fellow women runners.

Experience the iconic Bonneville Salt Flats May 1 and 2, 2026, with distances from 5K and 10K to 50 mile, 100K and 100 mile ultramarathons. Flat salt runs, mud flats and rolling hills deliver a one of a kind endurance challenge.

Coyote Two Moon is a multi distance trail running event May 1 to 3, 2026 in Ojai, CA set in the rugged Los Padres National Forest. Expect big climbs, sweeping views and a limited 150 person field for an intimate mountain challenge.

San Diego 100 is a rugged 100 mile loop ultramarathon around Lake Cuyamaca on May 1 and 2, 2026, featuring mostly single track mountain trails and about 15,400 feet of climbing. With a 32 hour time limit it serves as a Western States 100 qu..

Run 13.1 miles along the scenic Jordan River Parkway in Lehi, finishing beneath the South Mountain foothills. Enjoy paved trails, on course support, a locally made finisher medal and a small field for a relaxed race day vibe.

Ozark's Mountain Challenge invites hikers to Sam A. Baker State Park for eight ascents of Mudlick Mountain completed within 12 hours. Expect steep, rugged trails and a challenging but rewarding endurance experience.

Run Grayson Highlands State Park on May 2 and 3, 2026, choosing routes from 8 mile to 50 mile with chances to spot wild ponies. Enjoy postrace food, pro photos and swag while supporting the park and local rescue squads.

Take on the Donald Dash Trail Run on May 2, 2026 at Donald County Park in Mount Horeb, WI with scenic 5 km and 15 km options over prairie, single track, sand and hills. Limited to about 300 runners, all proceeds fund Friends of Donald Park..

Take on TutHell 50K in Sioux Falls, a brutal and addictive test of grit with 100 short loops up and down Tut Hill. The marked course features a stocked aid station, live timing, and a supportive community atmosphere raising funds for charit..

Tackle a scenic 6 mile Rim to Rim road race through New River Gorge, featuring a 1300 foot descent and climb with sections up to 20 percent grade. Finish at Adventures on the Gorge rimside pool with an overlook photo op.

Hit scenic single track at Lake of the Ozarks State Park with options from a fun 5 mile to a rugged 25K and a 32 mile LOZ Traverse that includes paddling across the lake. Enjoy finisher swag, live music and a lively post race atmosphere.

Run the Muddy Shoes Farm Park Challenge at Agricultural History Farm Park on May 2, 2026, completing each lap in under one hour. Choose 3 hour, 6 hour, or 10 hour challenges or marathon and 25K; volunteers get event swag.

May 2, 2026: Greenland Trail Races at Greenland Open Space in Larkspur offer distances from 4 miles to 50K plus a virtual option. Scenic dirt trails with Pikes Peak views, aid stations, tech shirts, medals, and a 50K buckle.

Niwot's Challenge is a by invitation only endurance event near Sedalia, Colorado that prizes off trail navigation and self reliance over racing. Limited to 40 entrants, it offers routes up to 100 miles for experienced wilderness runners.