Trail Running Calendar United States 2026-2027

Complete ten 5k runs every two and a half hours in this 24 hour challenge in Brandon. Enjoy hot meals and community activities between laps while striving to earn a custom finisher coffin.

A 5k (3.1 miles) mud run in Oak Harbor with 20+ obstacles offering "challenge" and "Xtreme" lines, participant medals and T-shirts, and a 10% proceeds donation to Ronald McDonald House Charities.

Run the Rails in Elburn, IL features a 1-mile fun run plus 4- and 7-mile races at Prairie Park, crossing the Union Pacific West rail line, with proceeds supporting the Elburn Parks Commission.

A mountain trail race on August 22, 2026 in Los Alamos, NM listed as a 10K but slightly short. The route climbs to the Pajarito summit above 10,200 feet with about 1,350 feet of ascent and marked singletrack descents.

A chip timed 5K trail run at Salamonie Lake with wooded, gently rolling trails, a participant pancake breakfast, and fresh sweet corn for sale. Proceeds support Friends of the Upper Wabash Interpretive Services.

A trail event at Briar Patch Hunting property featuring a 20K made from repeated 5K loops, relay and individual divisions, and Beer Mile races. Beer or chocolate milk is offered before laps and beer is available to those 21 and older.

A trail event in Boise on August 22, 2026 offering 5K and 12K courses that can be run or hiked, with proceeds supporting the Bogus Basin Nordic Team and cash prizes in the 12K divisions.

Powder Keg at Carter Park in Kings Mills, Ohio on August 22, 2026 features a roughly 3.5 mile trail loop along the Little Miami River with an old road, an old dam, and a stair climb. Online registration only, fee $23.50.

Trail races at Morgan Hill State Forest use a roughly 3.3 mile loop with 607 feet of climb; choose a timed 3-hour event or the $1,000 Challenge requiring seven laps with gender equivalent targets. Aid, limited parking, and race day bib pick..

Trail races in Arrowhead, Colorado on August 22, 2026 include a 13.3 mile half marathon with 2,844 ft of climbing and a mostly downhill 5.6K. Courses run mostly on single track and finish at Arrowhead Village with awards and post race food.

A free community trail running festival in Park City on August 22, 2026 featuring a social group run, an expo with local brands and race directors, food, and a raffle with prizes.

Chupacabra Trail Race is the fourth event of the Wild Thangs Trail Series at Monte Sano State Park in Huntsville, AL. It offers 10K and half marathon trail courses with aid stations, a cupless policy and a capped field.

Trail races of 10K, half marathon and 30K run through redwoods near Felton, CA, on varied single track and fire road with river crossings, marked courses, aid stations, chip timing, and a cupless hydration policy.

A day of looped trail events at Comlara near Hudson, IL, with timed options from one hour to twelve hours, a relay race, and an open course option. Runners complete roughly four mile loops and must return each hour to continue.

A mountain trail race near Kamas, Utah using a 13 mile loop once for a half or twice for a Marathon+. The course includes ridges, pines and lakes, with up to 3,600 feet of climbing and multiple staffed aid stations.

A map-based 5K and 10K in San Francisco where teams navigate checkpoints and answer multiple-choice questions, followed by refreshments at the finish.

Dog Days ULTRA in Missoula, Montana runs August 22-23, 2026 and features timed solo events plus a 24 hour relay. Registration runs March 9 to July 9, with fees listed per event.

A 4 mile open time trial on the single track trails of Schenectady Central Park with individually timed laps. All proceeds go to Hive of Hope, a community organization supporting recovery through connection and movement.

A 13.7 mile trail race from Stinson Beach to Mill Valley and back on the Dipsea Trail. The annual handicapped event uses adjusted start waves and time cutoffs; 2026 marks the 56th running.

A 12 hour trail event at Saunder Springs Nature Preserve in Radcliff, Kentucky, offering solo, two person, and four person team options on a loop course that mixes technical and runnable trail with waterfalls and creekside sections.