Trail Running Calendar United States 2026-2027

A 5k cross country run and 1 mile fun run through Ruppert Nurseries' 500 acre tree farm in Gaithersburg on March 22, 2026. Proceeds support the Montgomery County Children’s Opportunity Alliance.

Conquer the trails at Worthington State Forest in this arduous 30K or 50K+ event. Runners tackle a technical 6.7-mile loop with significant elevation. Finishers of both distances earn a commemorative award.

The Lag Bon 10K is a trail race in Fairfax, CA, on March 22, 2026. This run supports clean water access and features a scenic, technical course around Marin's reservoirs.

Conclude the winter series with a 10K trail race at the Hickory Knolls Discovery Center. Navigate dirt paths and limestone trails to earn your finisher medal and final pieces of the challenge series gear.

Celebrate 50 years of Southern Arizona Roadrunners with this free, retro-themed cross-country event. Run the 5K on scenic trails at Lincoln Regional Park, with a 1-mile race for kids. Dress in 70s gear for a fun, no-frills community run.

Run loops on the scenic trails of Calvert Cliffs State Park. You have six hours to cover as much distance as you like, with aid and hot meals provided. A virtual option is available.

Run through the Skyline Ridge Open Space Preserve on a scenic course featuring coastal views and gentle hills. All proceeds and matched entry fees support medical aid programs via The Hatuey Project.

Join the Dessert Dash at Stars & Stripes Park for a sweet celebration featuring 5k and 10k chip-timed races alongside family friendly runs. Cross the finish line to enjoy music, finisher medals, and your well-earned dessert reward.

Join the 7th Annual AZ Walk of Courage at Rio Vista Park, supporting burn survivors through Changed by Fire. Choose from a 10K, 5K, or 1 Mile course on the paved New River trails. All participants receive a medal and shirt, with age group a..

Run or walk with your dog on the beach at Jacksonville Beach to support dog rescue. Choose between a 5k race or a 1 mile fun run. The event includes medals for all and a party at a local pub afterwards.

Join The Husky Run 5K on the scenic Ma and Pa Trail in Bel Air. This walk and run event is open to all ages and abilities. Every finisher earns a limited-edition Husky medal.

This ultramarathon in Georgia's Sweetwater Creek State Park features 200-mile and 100-mile distances. Runners navigate a mix of trail loops with generous time limits. The event includes support like hot meals, sleep stations, and profession..

The Arizona Monster 300 is a 304-mile point-to-point ultramarathon through the Sonoran Desert. Runners face over 41,000 feet of elevation gain on a mix of single-track trails and remote backcountry. The event features 19 aid stations and a..

Experience the beauty of the Columbia Basin at this volunteer led trail event featuring distances from 15km to 100 miles. Explore the Badger Mountain Preserve while supporting local trail conservation and community fitness.

A 48 hour ultra event on a 2.71 mile forest loop in Georgia where participants can run any distance at their own pace and enjoy hot meals while supporting local river conservation.

Tackle a 2-mile loop through Ohio's scenic Majestic Farm in this timed ultrarunning challenge. Choose from 48, 24, 12, or 8-hour events, with free horse stall storage and unique finisher buckles. The inclusive event supports athletes with d..

The Bad Ass Backyard Ultra tests endurance with a relentless hourly loop format in Rio Linda. Complete a 4.16-mile loop every hour to stay in the race. As an official Backyard Ultra, it offers a path to national and world championship quali..

Race against the clock on a 2.25-mile alternating loop trail in Lowell Park. Choose the 8-hour 806, the 3-hour 314, or form a relay team. Finishers within the time limit earn unique apparel.

Experience a fast and flat trail race at the 10th Annual Coast to Crest 10K and 5K in Del Mar. Enjoy wide open lagoon views and a downhill finish on a well groomed dirt course.

Experience the desert landscape of Moab Utah at the Behind the Rocks Ultra. Choose from four different trail distances ranging from 10 miles to 50 miles on the technical terrain of the Behind the Rocks Trail.