Trail Running Calendar United States 2026-2027

A Lazarus Lake–sanctioned Backyard Ultra in Williamson, West Virginia, held during Memorial Day weekend. Runners repeat a measured **4.1667 mile** out-and-back loop each hour with live timing and a single aid station at the start/finish.

Evening 5k and 10k through the historic Manassas National Battlefield with start and finish at The Winery at Bull Run in Centreville, VA. In-person and virtual options are offered, with some virtual packages including medals or shirts.

A community oriented, non competitive 5K on the Bath Cross Country Course honoring a longtime local teacher, with free student participation and proceeds supporting an annual memorial scholarship.

A self paced summer challenge in Central Oregon from May 22 to October 1, 2026 where participants summit nine buttes and redeem a free pint at each sponsored brewery. A single butte Micro Challenge is also available.

A four mile cross country race in Riverdale and Van Cortlandt Park with an informal kids fun run, finisher hat, awards for top finishers and masters, and post race refreshments; proceeds benefit the FDNY Foundation.

Experience a unique 50K event featuring ten consecutive 5K runs starting every hour on a natural surface course. Bring your own supplies and enjoy a social atmosphere with fellow runners during the scheduled breaks between laps.

A multi-distance loop ultrarun at a private ranch in Riverside, CA, featuring one-mile laps, timed solo and relay options, free on-site camping, and awards for distance milestones over Memorial Day weekend.

Tough Mudder Philly on May 23, 2026 at Plantation Field offers 5K, 15K and Infinity obstacle runs with named obstacles, finisher items, spectator festival access, and group and volunteer options.

Trail races on a roughly 10-mile loop at Calvin Crest near the Platte River, offering multiple distances and technical single-track terrain; proceeds support the camp's trails and facilities.

A trail running weekend in Leavenworth, Washington with a new 25K skyline loop, a double-loop 50K, and a town 5K, set on ridgelines and forest roads with aid stations and a Bavarian-style festival atmosphere.

An out and back on the Badger State and Sugar River rail trails in Belleville, WI on May 23, 2026, offering 50 mile, 50K and half marathon options with aid stations, photos, pizza and beer provided.

A 12 and 24 hour endurance run on a 3.68 mile loop at Keweenaw Mountain Lodge in Copper Harbor, Michigan. Teams or solo runners alternate on course while passing wooded trails, a historic golf course and views of Brockway Mountain and Lake..

A multiwave obstacle course at Byron Motosports Park offering 10K, 5K, ruck, and kids divisions, with Special Forces and Endurance competitive formats and team entry packs available.

Honor fallen service members at this patriotic trail event in Black Canyon City featuring 5K and 10K options. Run or ruck the scenic out and back course while proudly carrying the American flag.

Participate in a USATF certified 5k or 1 mile fun run in Fort Gibson during Memorial Day weekend. Support the installation of permanent flags while running through a scenic course honoring past and current service members.

A time based endurance event on a scenic 5K loop offering six hour and twelve hour formats for solo runners, teams, and walkers, with Runners Village, optional camping, live tracking, and post race awards.

Austins Backyard Marathon on May 23, 2026 in Central Texas uses a last person standing format of repeated 4.167 mile (6.7 km) loops. Medals are given for completing at least one loop and for half marathon, marathon and ultra distances.

A nighttime loop race at Cline Buttes in Redmond Oregon offering 3, 6, and 12 hour options, a Last Person Standing format, and a one-loop 5k. The 3 mile loop includes a 0.5 mile 800 foot climb and a single aid station.

Enjoy a donation based trail run through the scenic Ouachita National Forest with 20 mile and 12 mile options. Finish your day with a community cookout and season celebration at the Lake Sylvia Day Use Area.

Trail and mountain bike races take place on singletrack trails along the San Gabriel River in downtown Georgetown. Distances range from a youth one mile to a 50K and the event uses chip timing and marked aid stations.