Trail Running Calendar United States 2026-2027

A looped Last One Standing race at Clark Reservation State Park in Jamesville, NY. Short laps and descending cutoff times continue until one runner remains, with awards for the last finisher in each gender division.

Trail races at Mansfield Hollow State Park with a 15-mile out-and-back on the Nipmuck Trail and a new 5K route; proceeds support Connecticut trail stewardship and the event is organized by Shenipsit Striders.

A 100K ultramarathon on nearly all singletrack around Lake Tahoe with 11,500 feet of climbing, over 23,000 feet of elevation change, a peak near 9,800 feet, three aid stations and a 24 hour cutoff.

A charitable walk and run at Howarth Park in Santa Rosa supporting Dogwood Animal Rescue with an in-park celebration and a virtual option that includes a mailed race packet and bandana.

Mountain to Meadow offers a half marathon and a 10k along gravel Forest Service roads near Lolo Pass, with meadow and mountain views. A post-race BBQ serves brats, salad and Big Sky Beer.

A second annual running event at the Old Los Angeles Zoo area on June 14, 2026, offering a half marathon and a 12K on relatively flat, scenic trails. Registration runs November 21, 2025 to January 26, 2026 with fees from $49.

A community 5K trail run, walk, and hike at Eisenhower Park in Milford on June 14, 2026, on a high school cross country course. The event supports the Milford Rotary and Beth El Center and includes music, water, snacks, awards, and T shirts..

A 5K road race in Dewey Beach on June 14, 2026 that benefits the Dewey Beach Patrol and is part of the Ten Sisters series. The event includes a competitive walking category, chip timing, tech shirts, and a post race party with food and beer..

Races on June 14, 2026, through the sandstone formations of Garden of the Gods Park in Colorado Springs. Options include a 10 Mile, two 10K races (road and trail) and a 2.9 mile Youth Classic; registration windows and fees vary.

A community 5K in Marienville offering a run and a walk, finisher medals for all and T-shirts guaranteed for signups by May 31, 2026; age groups span from 1-14 to 75 plus.

A chip timed 5K at Mackinaw Valley Vineyard and Winery on June 14, 2026 with a two lap course over grass and uneven terrain. Registration includes a shirt, collapsible wine glass, finisher medal and a pour of wine; age group awards and a ch..

An adventure race on June 14, 2026 at White River West Sno Park near Mt Hood, Oregon, featuring a roughly 6 miles off road course, advance registration, a $50 entry fee, and camping near the start and finish.

Part of a five day Jackal series in Jackson, Tennessee on June 13 to 17, 2026, the Backass Jackal Trail Marathon is run on 100% wooded looped trails with loops reported between 2.65 and 5.25 miles.

A 5K obstacle mud run in Pittsburgh on June 14, 2026, held at Switchback MX. The event offers standard, VIP and volunteer ticket options and lists a partnership with the National Breast Cancer Foundation.

Treat Trot Indianapolis on June 14, 2026 at Arthur Jordan YMCA offers in-person and virtual options, from a kids dash through 15K. Registrations include a shirt, custom medal, free photos, and chip timing for applicable distances.

A hilly 14K around Armstrong Hill in Jeffersonville and Fletcher VT with about 1000 feet of gain on mostly dirt roads. The event includes two aid stations, a capped field, and a post race Boneyard Bash with music and local food.

Los Mugrosos 5K in South El Monte on June 14, 2026 features a scenic single loop trail and a kids dash for ages 2 to 12. The main 5K includes a shirt and finisher medal and is limited to 90 runners.

A 5K trail race on June 14, 2026 at Garbry Big Woods Reserve in Piqua, part of the Miami County Park District Trail Run Challenge. Multiple registration tiers include shirt and no shirt options; basic health checks and age group awards are..

Mud Factor Omaha is a 5K mud run at Bellevue Berry & Pumpkin Ranch on June 14, 2026 featuring adult and family kid waves, required signed waivers, spectator fees, tiered registration pricing and event photos for purchase.

A four-race running series in Winter Park, Colorado, from June 14 to August 22, 2026. Events range from a family 5K to half marathons and are scored by a points system with Open Men and Open Women categories.