Trail Running Calendar United States 2026-2027

FORGE is a 12 hour backyard ultra near Swinomish Casino in Skagit County, WA. Runners complete a 4.167 mile loop each hour; finish all 12 loops for 50 miles. Awards include trophies and a $500 prize for fastest cumulative time.

A three-race trail series in Park City from June 6 to August 1, 2026, featuring 5K, 10K and a half marathon. Entrants may choose individual races or the full series and a group discount is available for four or more.

Mountain ultramarathons in Colorado’s Wet Mountains that move from mossy fir forests and alpine meadows to dry pinyon and sagebrush terrain, with limited fields and large elevation change.

Dirty Half is a 13.1 mile trail half marathon near Bend, Oregon on June 6, 2026, with finisher prizes, awards by division, post race food and beer, and technical long sleeve shirts whose proceeds support the Deschutes Land Trust.

Experience a trail race along the largest inland beach in Ohio at Alum Creek State Park. Choose from distances ranging from 5K to a half marathon or join a relay team to run through scenic shale cliffs.

A community 5K on June 6, 2026 in Joliet along the Rock Run Greenway Trail with start and finish at Cemeno's Pizza. Proceeds benefit the Pat Clark Cancer Foundation to support local cancer patients and families.

Into the Woods Trail Run Series at Asbury Woods features 4, 5, and 6 mile trail races across packed dirt, boardwalk and single track. The summer event includes a youth run and free childcare, and a three race bundle offers a discount and gi..

A trail race at Canyon Park on June 6, 2026 with multiple distances around a 7.8 mile loop near Canyon Lake. The event features detailed course markings, cupless aid stations, chip timing and support for the Great Springs Project.

Trail races near Weott, CA, with a 30K and a 10.5-mile course that climb Grasshopper Peak and finish among old growth redwoods. Online registration closes June 3; no in-person registration.

Trail runs in Naples NY with a rugged 25K single loop around the Cumming Nature Center and Honeoye Inlet Wildlife Management Area and a more runnable 10K. Proceeds support environmental education at the RMSC Cumming Nature Center.

Experience the longest running night trail series in the country at Pedernales Falls. Choose from distances ranging from a youth mile to 60K and enjoy a unique evening of trail running in the Texas Hill Country.

A longstanding five-mile memorial run on the C&O Canal Towpath in Williamsport, MD, held June 6, 2026, with regular and student entries, chip timing, technical T-shirts, and awards for podium finishers.

The Kan is a mountain trail event at Mt Spokane State Park offering 50k, 25k and 10k courses that climb to the summit and return via alpine and ski-trail terrain. Entries include post-race food and beer and a prize purse.

The City of Fullerton’s inaugural Fullerton Fit 5K Trail Run takes place June 6, 2026 on a dirt course near Brea Dam, accompanied by a Health & Wellness Fair with vendors, demonstrations, and food trucks.

A trail race on Tiger Mountain State Forest near Issaquah with 5k, 12.6k, and a 13.56 mile half marathon routes. Loop courses use forest roads and singletrack with aid stations offering water, electrolyte drink, and snacks.

A new 10 Mile race and a two person 5 Mile relay run along the Mississippi River through Hidden Falls Park to Upper Landing Park, with riverside trails, lakes, scenic bridges, and a shuttle return to the start.

An adaptive trail event at Russ Nature Reserve offering 1 mile, 2 mile, and 5K options; rolling starts accommodate walkers, runners, and wheelchair participants, with member fee waivers and on-site registration options.

Trail running at Salt Fork State Park with 50k, 20 mile and 10 mile loop options over rolling trails; part of the Ohio Endurance Series and supporting local search and rescue.

A full-day community event at Walt Hundley Playfield on 06/06/2026 featuring obstacle-course waves, a 5K fun run, a 3K walk, and a 1K youth dash, with proceeds supporting Our Lady of Guadalupe Church and an on-site after-party.

A timed loop trail fundraiser at Ponderosa State Park near McCall, Idaho, with six and twelve hour options, a 4.79 mile loop, varied single-track terrain, and proceeds supporting local park trails.