C&O Canal 100

The Final Countdown Tribute is a unique running event held at Amani Brewing in Martinsburg, WV. The race features a 1.33-mile loop on a smooth, well-maintained grass trail with gentle hills. Runners must complete each lap within a decreasing time limit, starting at 20 minutes and shortening by 20 se..

River's Edge Endurance Challenge is a nonprofit running event held at Brunswick Middle School, Maryland. The lineup includes a 5K (3.1 miles), a 3-Hour Endurance Race, and a 6-Hour Endurance Challenge. The largely trail-based course runs on the River's Edge Trail System, with about a mile on school..

The Fall Harvest 5k is a scenic trail race held at Claude Moore Park in Sterling, Virginia. Set amidst the vibrant colors of autumn, the course features forest paths and leaf-covered trails, offering a picturesque experience for both runners and walkers. This event is part of the Run Your PRCS Parks..

The Rick O'Donnell Memorial 5 Mile Trail Run & Ultra Challenge takes place at Milkhouse Brewery at Stillpoint Farm in Mount Airy, Maryland. In its 13th year, the event offers three ways to test endurance: a single 5-mile trail loop, a 4-hour challenge, and an 8-hour ultra challenge. The hilly course..

Boulder Dash at Pinesburg Quarry is a running event hosted by Martin Marietta in Williamsport, Maryland. It offers a 5 Mile Challenge, a Family Friendly 5K, and a 1 Mile Fun Run for all levels. The 1 Mile Fun Run and 5K travel on rolling roads and packed gravel around the quarry; the 5 Mile goes int..

The MCRRC Stone Mill 50 Mile Run is a 50-mile trail ultramarathon in Montgomery Village, Maryland, organized by MCRRC. The course uses forested, rolling terrain along the Seneca Greenway and Muddy Branch trails in Montgomery County, primarily on single-track dirt trails with small stream crossings...