Trail Running Calendar United States 2026-2027

Tough Mudder Chicago on August 29, 2026 at Richardson Adventure Farm features 5K and 15K obstacle runs, an 8-hour Infinity lap format, Mudder Village festival amenities, and finisher medals, shirts, headbands and drinks.

A weekend of obstacle races at Summit Bechtel Reserve on Aug 29–30, 2026 featuring Sprint, Super, Beast, a kids race, and a pre-race obstacle workshop across hilly, water‑featured terrain.

Trail half marathon and 50k on the single-track Switchgrass Mountain Bike Trail at Wilson State Park. Exposed, hilly course beside Wilson Lake with two aid stations, marked routing, awards, and finisher items for each distance.

Trail races near Mount St. Helens in the Mt. Margaret Backcountry, offering 50K, 20 mile and half marathon loops with remote terrain, ridgeline views, lakes and varied wildlife.

A timed 10-hour endurance run at Bluhm County Park on August 29, 2026 where runners repeat a 4 to 4.1 mile trail loop with hourly cutoffs, chip-based prizes, a limited-edition shirt, and a wooden medal.

A small, trail-focused ultramarathon in Westboro, Wisconsin, held on the Ice Age National Scenic Trail with 100 mile, 100K, and 50K options through the Chequamegon-Nicolet National Forest.

A 3 mile obstacle run at Phil Moore Park on August 29, 2026 raising funds for child abuse prevention. Individual and team entries are offered plus a free Kids Mud Bath for children under nine.

A point to point 50 miles on the Baker Trail in Pennsylvania covering the northern section. Individual and relay entries are available, with a fourteen hour cutoff and a three piece medal series for finishers.

A Last Man Standing race in Half Way, Missouri where each 4.167 mile lap must be finished in a shrinking cutoff that loses one minute per lap. Rural chip sealed course with aid stations and on-site primitive camping.

An 8.88 hour timed trail event in August in Atlanta with multi-loop laps over river and through woods. The race has a no DNF, no cutoff, no crew policy and a flat $88.80 entry fee.

Trail races on August 29 and 30, 2026 offering 50 Mile, 50K, 26.2 Mile and 13.1 Mile distances. Registration is closed and a wait list will be available; organizers state the race includes notably large finisher medals.

Trail races at Grand Targhee on August 29, 2026 cover 7.1 miles with 2,212 feet of vertical gain across Sport, Expert, and Pro divisions plus a volunteer category. Per race prizes and season points are awarded and the field is capped at 500..

Trail races at Salt Springs Park on August 29, 2026, offering 5K, 10K and a 50K five-loop course through old-growth forest with steep climbs, technical single track, aid stations for the 50K, chip timing, and volunteer-supported park benefi..

The Labor Day Slay at Queeny Park on August 29, 2026 features 5K, 10K, 10K Ruck and a half marathon on marked trails with chip timing, lap aid stations, finishers medals and age-group awards.

Rock Hawk Trail Races on August 29, 2026 in Castle Rock, Colorado offers 50K, 25K, 10K and 5K on rolling singletrack with cup-free aid stations, chip timing, finish-line photos, drop bags, and live split tracking.

Trail races in St. Croix Falls WI on August 29, 2026 offering Marathon, Half Marathon and 10K on mixed single track, gravel and paved trails from the Polk County Information Center. Field limited to 150; registration runs Nov 28, 2025 to Au..

A trail race weekend in Waterville Valley NH with a 50K ultra, 23K, 4 mile and 1 mile family fun run. Courses use single and double track, have cup less aid stations, and include finisher awards and podium prizes.

A trail event at Kansas Maze in Buhler, Kansas that sends runners through over 20 acres of sunflowers. Offers 5K and 1 mile options on August 29, 2026 with finisher shirts, medals, and on site festival perks.

A family-friendly 5K mud run on August 29, 2026 at Budds Creek Motocross Park featuring obstacles, mud pits, a pre event warm up, and an after party with music and food. Value and VIP registration options are available.

Trail races at Huddart Park, King's Mountain and Bear Gulch offer measured distances from a 50 yard kids dash to a 50K, with fees listed per distance and registration opening November 11, 2025.