Trail Running calendar near Derwood 2026-2027

Devil Dog Ultras features 100-mile, 100K, and 50K trail races on a loop course in Prince William Forest Park. With fully stocked aid stations and a unique loyalty challenge, it's an event built for the trail community. Registration for the..

Trail runs at Fountainhead Regional Park on hiking trails and old dirt roads with 4.8- and 10.5-mile options, aid stations, post-race food, and a kids race and program for ages 2-11.

Experience the rolling hills of Fair Hill Natural Resource Management Area during this winter trail event. Choose between 25K or 50K distances on beautiful single track trails with heated facilities and fully stocked aid stations.

Experience a scenic out and back half marathon on the flat and smooth Dahlgren Railroad Heritage Trail. Enjoy a unique post race campfire with roasted donuts and earn a custom finisher medal.

Experience a 50 km trail run through the rolling fields and woods of Maryland featuring 5,800 feet of elevation gain. Enjoy well stocked aid stations and a heated indoor post race celebration with handmade finisher awards.