High Rock Mountain Running Challenge

Mountain Creek Mayhem takes place at Pine Grove Furnace State Park in Gardners, PA, within Michaux State Forest in the northern Appalachians. The event offers 50K, 20-Miler, and Half Marathon distances, featuring flowy single-track, ridgelines, rocky descents, and sweeping views. Elevation gains run..

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..

Hauser Hill Spiked Apple 5k takes place in Biglerville, Pennsylvania at the Hauser Hill Event Center, a 172-acre ridge-top venue in apple country. The chip-timed 5K Run/Walk starts and finishes at the winery on a cross-country course with uneven footing and gentle inclines, offering vineyard views a..

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 C&O Canal 100 is a 100-mile ultramarathon held in Knoxville, Maryland, along the scenic C&O Canal towpath near the Potomac River and Appalachian Mountains. The course features one approximately 40-mile loop followed by two 30-mile loops, starting and finishing at Camp Manidokan. Runners enjoy a..