Trail Running Calendar United States 2026-2027

A community 5K in Hillsborough, NH on September 20, 2026, organized by the Hillsboro Fire Department. The off-road course may be uneven and strollers are not recommended; registration runs March 25 to September 19 with a $30 fee.

A non-timed 2K and 5K trail run/walk at Case Creek Valley that welcomes leashed dogs and supports Rock Island County Animal Care & Control Shelter, with race bibs, optional T-shirts, finisher dog tags, and hydration stations.

A day of youth and adult cross country races in Aurora, Colorado on September 20, 2026, featuring grass courses with small undulations, a creek crossing, and bale jumps; distances run from 2k youth races up to a 5k open race.

A running event in Iroquois Park with an approximately 7.5 mile Lookout course and a 3.4 mile Short Loop option. Finishers receive medals and shirts are available by preorder with limited race day sales.

A one lap up and down mountain race in Waterville Valley, New Hampshire on September 20, 2026, part of the USATF-New England Mountain Racing Circuit. The course uses grassy ski slopes and gravel service roads and includes three aid stations..

The Arc'teryx Run Boston will take place in Milton on Sunday 20 September 2026. You can run 10 kilometers.

A fall trail race at Merck Forest and Farmland Center featuring an approximately 8.5 mile loop with about 1,800 feet of climbing and two aid stations. A separate 0.75 mile kids loop circles the farm and allows parent participation.

A self supported six stage footrace across the high desert from the Grand Canyon to Kanab, covering 171 miles over seven days. The course spans about 5,000 to nearly 8,700 feet and now includes a supported category.

A women only 5K obstacle mud run at Carter & Stevens Farm in Barre, MA on September 20, 2026. The course has 18+ obstacles, welcomes participants ages seven and up, and emphasizes teamwork over competition.

A timed charity tower climb at Empire State Plaza in Albany that reaches the 42nd floor with 809 steps. Water stations, bailout floors and medics are provided; registered participants receive a t shirt and finisher's medal.

A family friendly 5K run in San Francisco with a scenic course from Mountain Lake Park to the USS San Francisco Memorial and post-race festivities.

Multi distance running event at Hell's Gate State Park on September 24 2026 with races from 5K to 50K and no time limits.

A 100 mile point to point ultramarathon from Logan Utah to Bear Lake on September 25, 2026, serving as a qualifier for Hardrock, Western States and UTMB.

A multi-distance trail race weekend in Mammoth Lakes featuring technical high-elevation courses, marked routes, aid stations, a cup-less policy, and chip timing.

Rocky Mountain Slam concludes with The Bear 100 in Logan UT on Sep 25 2026 and requires completion of four races including The Bear as part of RMS V2.0.

A point to point ultra on Nebraska’s Cowboy Trail offering 200 mile and 100 mile options over mostly crushed gravel, with staffed aid stations, sleep stations, distance specific finisher buckles, and cash prizes for top finishers.

Experience the wild spaces of Northern Colorado with a weekend of trail races ranging from a half marathon to a 50 mile ultra through scenic forests and scout camp trails. Stay on site with available camping and community meals.

Echo 136 is a 136 mile trail ultramarathon on the Ice Age State Trail in Whitewater WI with a 55 hour time limit and nine fully stocked aid stations.

A three day mountain trail weekend at Arizona Snowbowl with distances from a short hill climb to 50 miles, plus fixed time events and high elevation courses.

A two day festival in Shawnee Ohio on the Buckeye Trail featuring a Half Marathon, 10K, 5K, a 10 Mile Hike and a backpacking workshop. Events occur on mostly single track trail within the Wayne National Forest.