Trail Running Calendar United States 2026-2027

Nighttime 5K and 10K loop races in downtown Fort Worth under the full moon, with a mostly grassy course along the Trinity River, chip timing, water stations, shirts and medals.

Nighttime trail run at a private San Diego ranch on 08/28/26 with marked loops of 5k, 10k, 15k and 30k. Headlamps or flashlights required; reflective aid stations, on-site camping, tech tee and awards are included.

A Spartan obstacle weekend at Mahon Ranch near Elk Grove features a Sprint 5 km with 20 obstacles, a Super 10 km with 25 obstacles and kids races, plus team entries, volunteer options and service member discounts.

A trail-style 5K and 10K at Dirt Farm Brewing in Bluemont on August 29, 2026, with rugged terrain, steep sections, and winding paths; virtual entries available with different medal and shirt options.

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 trail race in Chequamegon-Nicolet National Forest on large sections of the Ice Age Trail offering 100 mile, 100k and 50k distances. Organizers reserve nearby Spearhead campground and the course uses single-track and forest roads.

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-mile ultramarathon on the Baker Trail Northern section near Brookville, PA, featuring 6,200 feet of climbing, individual and relay options, a three-piece finisher medal series, and free training runs before the race.

A Last Man Standing event near Half Way, Missouri where each lap is a 4.167 mile out and back and the allowed lap time drops by one minute each circuit. Rural highway course with staffed and grab and go aid stations and on site 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..

Experience the rugged beauty of Salt Springs Park with technical trail races through old growth forests and wetlands. Choose between 5K, 10K, or a demanding 50K ultra featuring 7,000 feet of elevation gain.

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 offering Marathon, Half Marathon and 10K routes across single track, gravel and paved surfaces. Online entry is limited to 150 runners and closes August 25, 2026.