Trail Running Calendar United States 2026-2027

Family friendly mud run 5K in San Antonio with obstacles, waist deep mud pits, a Pre-Party and After-Party featuring music, food trucks and onsite bag check.

A 13.1 mile half marathon on the Croft Passage of the Palmetto Trail in Spartanburg, South Carolina. The technical course has some hills, a four hour cutoff and a field limited to 250 runners.

Cuyamaca 100k is a 100 kilometer trail race in San Diego on Oct 3, 2026, crossing oak woodlands, meadows, pine forest and chaparral. The 2026 event is a Western States 2027 qualifier and supports outdoor education and public lands causes.

A point to point half marathon on forested single track near Kirksville, MO with seven aid stations, shuttle service, and proceeds supporting the Forest Lake Area Trail System.

Little Dog's Backyard Ultra in Bell Buckle TN on Oct 3 2026 is a Last Runner Standing race run on repeated 4.1666667 mile loops with a limited field and wait list.

Experience a historic 100 mile journey through the Ouachita Mountains on forest roads and trails. This Western States qualifier features 23 aid stations and a tradition of southern hospitality in any finishing time.

Experience the scenic HRCA Backcountry Wilderness Area with trail races for the whole family. Enjoy rolling hills and open views followed by a pancake breakfast and finisher medals for all participants in Littleton.

Trail canicross races at Caledon State Park offer two distances, allow leashed dogs, and provide a reusable speedCup; entry fees support Friends of Caledon State Park.

Trail races at Bradford Preserve on October 3, 2026 feature 5K, 10K and a free kids run on dirt trails with seasonal course markings and a required orange clothing rule per state regulations.

Scenic 5K, 10K and half marathon courses through Burke Lake Park trails with in-person and virtual entry options; walkers are welcome.

A Woodland Park trail event featuring 50k and 10k options on singletrack and forest roads with views of Pikes Peak, stocked aid stations, and crew access for the 50k.

Loop trail races in Shawnee State Forest on October 3, 2026, with 54 mile, 31 mile and 13.1 mile options, significant elevation gain, cupless aid stations and a remote wilderness section.

Timed endurance event in Cohoes, NY on Oct 3, 2026 with 1 hour, 3 hour and 6 hour solo and relay options supporting Flutters of Hope.

Multi-distance trail event at Lake Bistineau State Park featuring looped courses on park trails, staffed and unmanned aid stations, camping, swag, and awards.

Trail running and walk/hike options on the Deam Lake Loop in Borden, Indiana, with 5K and 10K courses, cupless aid stations using reusable cups, optional shirts, and wooden finisher medals.

A 5K and 10K trail run at Lake Crescent in Olympic National Park on October 3, 2026, with shuttle service and limited trailhead parking.

Mountain trail races on Mount Bachelor over October 3–4, 2026, including 6/12/24-hour summit loops and three looped courses. Chairlift use is included and multiple aid stations and lodge facilities support runners on alpine singletrack.

Experience an off road trail race through the Coconino National Forest at high altitude. Choose from a marathon, half marathon, or 10k while supporting local college cross country programs in the Arizona Nordic Village.

Weekend races in Waynesville MO with 5k, 10k and half marathon courses along the Roubidoux plus a combined Frog Hill Challenge medal.

A point-to-point trail marathon and 30K in Colorado’s North Fork Valley at peak fall color, with mountain climbs to Inter-Ocean Pass and proceeds funding summer camp scholarships.