Rick O'Donnell Memorial Ultra Challenge

The Blue Crab Bolt Trail Run at Schaeffer Farms in Germantown, MD, is a trail running event featuring 5K and 10K distances. Held at the scenic Button Farm Living History Center, the course offers a mix of flowy, fast, and fun trails with twisty single-track paths, stream crossings, log ramps, some h..

The Blue Crab Bolt Trail Run at Little Bennett Regional Park in Clarksburg, MD, offers a scenic and challenging trail running experience on August 2, 2025. Set in a 3,600-acre park with over 20 miles of trails, the event features 5K (3.7 miles) and 10K (6.2 miles) races along twisty single-track hik..

The MD Heat Trail Race, held in Elkridge, Maryland at the Patapsco Pickall Area, offers challenging trail running distances of 25K and 50K. The course features rolling single-track trails with over 2,000 feet of elevation gain, two river crossings, and a mix of technical rocky sections and runnable..

The Patapsco Valley 50K is an annual trail running event held at Patapsco Valley State Park near Baltimore, Maryland, with race headquarters at CCBC-Catonsville. The event features two distances: a 50K and a 25K, both available as in-person or virtual races. Runners enjoy a scenic, historic, and wel..

The Fall Backyard Burn Trail Run at Riverbend Park in Great Falls, VA, is a scenic trail running event featuring 5-mile and 10-mile race options. Set adjacent to the Potomac River and near Great Falls National Park, the course offers beautiful riverside singletrack trails with a few short hills and..

The MCRRC Stone Mill 50 Mile Run is a challenging trail ultramarathon held in Montgomery Village, Maryland. The 50-mile course features scenic routes along the Seneca Greenway and Muddy Branch trails, traversing forested, rolling terrain primarily on single-track dirt paths. Runners encounter small..