Trail Running Calendar United States 2026-2027

A half marathon trail race in Evergreen, CO that reaches the summit of Bergen Peak. Organized by the local parks district, the event includes vendor tents, refreshments, a cup-free policy and course marshals.

The 21st Annual Martha Walker Wild Duck is a 5 km cross country race at Guajome Regional Park in Oceanside, California. It is the opening race of the 2026 Dirt Dogs XC Series and includes a race flyer and course maps.

Trail running at Krause Springs, Spicewood with 5k to 50k distances plus a youth run, aid stations, medals, on-site activities, and a cupless format. The event is postponed due to severe weather; transfer and reschedule options are offered.

A community event at Riverwood Nature Center offering a 5K trail run and a 1 Mile nature walk with a kids scavenger hunt and a K9 unit demonstration. The 5K has a $30 entry fee and a t shirt guarantee for pre registration.

A community trail series meeting one Saturday each month through the summer, with three mornings and a sunset closing. Participants pick their own distance and return to a shared tent for breakfast, drinks, and company.

END-BACKYARD Ultra in McLeod, North Dakota on August 22, 2026 uses the backyard ultra format with repeated 4 mile 880 foot laps started once each hour. Runners continue while they complete each lap within the hour.

A community road event at Leopold's Preserve in Broad Run on August 23, 2026 offering 5 km and 10 km on-course races plus virtual options with medal and shirt choices. The race is part of the Sippin Series with Farm Brewery at Broad Run and..

A trail running festival at Thacher State Park on August 23, 2026, offering **10K**, **13.1M**, **26.2M** and **50K** courses that share the same first 10K loop. The cupless event has multiple aid stations, post-race food, and medals for ma..

Trail races of approximately 4, 9.5 and 13 miles at Paul Douglas Forest Preserve on August 23, 2026. Part of the Dick Pond Athletics Darn Tough Trail Race Series with awards, raffle prizes, and proceeds benefiting Chicago Area Mountain Bike..

A 5K obstacle mud run at North Carolina Motorsports Park on August 23, 2026, Muddy Princess offers Standard, VIP, and Volunteer options and supports the National Breast Cancer Foundation with on-course mud obstacles and finishers items.

A trail event at Granite Beach on August 23, 2026 offering 5K and 10K courses for runners and their dogs, with finisher medals and dog bandanas; aid stations provide drinks and gels and dogs have their own water.

Out and back trail races at the Route 54 parking area in Weiser State Forest, featuring a 13.1 mile half marathon and a 3.1 mile 5K along reservoir lakes. Field limited to 300 entrants and proceeds support watershed conservation.

A 5K cross country race at Waters Farm in Sutton Massachusetts that opens the USATF New England XC Grand Prix series. Separate men's and women's open races, on site registration, and a post race awards ceremony.

Experience an engaging 8 mile trail race through the winding singletrack of Fredericksburg. Navigate rolling hills and punchy climbs in this focused event supported by the local running community.

On August 23, 2026 Raptor Ridge stages a 6.5 mile trail race at Westmoreland Sanctuary in Mount Kisco, New York. The event starts and finishes at the Fox Lane High School campus, dogs are not allowed and non perishable food donations are co..

The Black Diamond Express Trail Races on August 23, 2026 run on the Lehigh Valley Trail in Mendon, NY, offering a 5K and a USATF certified half marathon. The event is organized by the Mendon Foundation with Monroe County Parks.

A two loop 4.15 mile cross country race on the fire roads of the UC Santa Cruz campus, starting and finishing at the meadow above the fire station and included in the Pacific Association USATF Grand Prix series.

East Lansing event on August 23, 2026 with a timed 5k on mostly grass trails and an untimed 1 mile fun run for kids. Hosted by the East Lansing Educational Foundation; registration fees apply.

OakRunner Trail Run features 5K and 10K mountain trail courses at Oak Mountain in Speculator, NY. The route runs on wooded, uneven trails with climbs and descents and a portion of proceeds benefits the Oak Mountain Race Team.

Two 5K cross country races at The Course in Spokane Valley on August 23, 2026, organized by the Bloomsday Road Runners Club. Entry fees, youth pricing, awards for top finishers, and a 1970s style headband for all finishers.