Trail Running Calendar United States 2025-2026

Thriller Lake Endurance Run takes place at Little Mulberry Park in Hoschton, GA, on a 2.2-mile paved loop around Miller Lake. It features multiple timed options—12, 6, and 3 hours—plus a Trick or Treat Fun Run for all ages. The atmosphere is a Halloween celebration of running, with participants in c..

Trail Run at Sly Park - Fall takes place at the Sly Park Recreation Area in Pollock Pines, CA. The event offers seven distances: 5K, 10K, 8 Mile, Half Marathon, 17 Mile, Trail Marathon, and 50K. The course circles Jenkinson Lake on rolling single-track through pine trees and horse trails, with plent..

The Rubicon is a very difficult, remote on- and off-trail foot race set in the backcountry of the northwestern Sierra Nevada, near Oxbow Reservoir, California. It offers three route options: The Requisite (15+ miles, about 6,700 ft of gain, 3 hill climbs and 2 water crossings); The Resonant (30+ mil..

Firewater Ultra takes place in Greenback, Tennessee, along the East Lakeshore Trail on Tellico Reservoir. Distances include a 100K; a 50K with Sunrise and Sunset variants; a 50K Relay; and a new 25K Ruck. The course uses the end-to-end Tellico Lake trail system: the 100K runs out and back the full l..

Scarin' Up Some Fun 5k Glow Run/Walk is held in Sedro-Woolley, Washington at the Northern State Recreation Area. The event features a 5-kilometer trail route winding through trails, barns and surrounding buildings. It creates a spooky, glow-themed evening atmosphere, with participants encouraged to..

Running for Love is a 5K trail run held in Fairview, Tennessee, at 7211 Bowie Lake Road. This event supports Love One International, a nonprofit organization dedicated to providing life-saving medical treatment to children in need in Uganda. The race offers participants a scenic trail course and a m..

The Sebastian Scream 5K & Haunted Rail Trail is an inaugural event held in Sebastian, Florida, supporting local first responders through proceeds that fund counseling and stress debriefing programs. The event features a 5K race starting and finishing at the North County Aquatic Center, with a course..

ScaryAss 25K/14K/4K is a low-key trail race in Olympia, Washington, starting and finishing at Fall Creek Day Use Area in Capitol Forest. Organizers offer three distances: a grueling 25K to Capitol Peak and back, a scenic 14K loop, and a family-friendly 4K along mountain-bike trails. The 25K features..

Oakland Hills Trail Run takes place in Redwood Regional Park, Oakland, CA, offering 35K, Half Marathon, and 10K distances. Runners traverse a forest of coast redwoods and other park communities, with most of the course on technical dirt trails and non-technical fire roads. Elevation gains are substa..

Hilloween is a festive 5K trail run and Keiki Trick-Or-Treat Run held annually at Omao Dirt Track in Koloa, Hawaii. The 5K course features off-road terrain with spooky hills, creepy obstacles, and scenic views of Kauai’s south shore, encouraging participants to wear costumes, with prizes awarded for..

Spooky Sprint- Columbus in Lewis Center, Ohio, is a Halloween-themed running festival slated for October 25, 2025, at Highland Banks Metro Park (9466 Columbus Pike). The event offers multiple distances: 1 mile, 5K, 10K, and a Half Marathon, plus a Kids Dash, Volunteer-then-Run option, and a Virtual..

Among the Trees is an ultramarathon event held in Dousman, Wisconsin, featuring 100k and 50k race distances. Set within the scenic Southern Kettle Moraine Forest along the historic Ice Age Trail, the course offers runners a challenging and picturesque experience amid vibrant fall colors. Both races..

Haunted Trail Run 5k/10k, a Halloween-themed race, is held Saturday, October 25, 2025 at French Shelter Park in Cincinnati, OH. The course offers a 5K route and a 10K route (two loops of 5K). The event blends spooky atmosphere with running, encourages costumes and features a Best Costume Award.All f..

The Last Cowboy Backyard in O’Neill, Nebraska, is Ultraverse Supplements’ first Backyard Ultra. The course follows the flat, non-technical Cowboy Trail as an out-and-back, starting and finishing at the O’Neill community center. Each lap is 4.17 miles and starts on the hour with all runners beginning..

The Race the Base Trail Run is a 4-mile competitive trail race held at Pinnacle Mountain State Park in Roland, Arkansas. The course features a scenic loop around the base of Pinnacle Mountain, combining gravel, paved trails, and 2.75 miles of technical single track. A notable challenge is "Joe’s Rev..

2025 Napa Fall Wine Country Marathon, Half Marathon & 10K takes place in Bothe-Napa Valley State Park along Saint Helena Highway in Saint Helena, CA. The course uses lush single-track trails with hills, streams and rocky sections, delivering a rugged and rewarding challenge, set just minutes from Na..

Set in Tusayan, Arizona, near the Grand Canyon South Rim, the Grand Canyon Trail Marathon, Half-Marathon, & 5k Run/Walk is a Run Tucson event with community partners. The weekend features a Half-Marathon, 5k Run/Walk, and a Marathon option added in 2025. The Half is roughly 13.1 miles on a Kaibab Na..

Mountain Mama Farms Classic is a 3.5-mile cross-country-style race held on private farmland in Summerville, Northwest Georgia. The flat, fast loop features minimal elevation and smooth trails, designed for distance in 4- and 8-hour formats. The event atmosphere is family-friendly, with wide-open fie..

Range of Light Trail Races take place at Millpond County Recreation Area in Bishop, California, offering four distances: 5k, 10k, 33k, and 50k. The courses combine fast dirt roads and tough single-track, with the longer routes looping through the Tungsten Hills to provide strenuous climbs and sweepi..

Georgia Sky to Summit is a fall trail race in Sky Valley, Georgia, offering two distances: 50K with 7,500 feet of gain and an 11-hour cutoff, and 25K with 3,500 feet of gain and a 5.5-hour cutoff. Both start and finish in Sky Valley, winding through surrounding mountains, past waterfalls and up to R..