Trail ultramarathons in Maryland, United States

Six-hour endurance format at Greenbury Point, with Chesapeake Bay waterfront views and an exposed coastal setting.

Technical 50k trail course with 4,000 ft of elevation gain, forest shade, rock scrambles, single-track, stream crossings, and mountain bike trails near baltimor

Consecutive 5k trail loops over 24 hours in scenic Pemberton Park, featuring frequent starts, short rest breaks, and campsite aid stations

Multiple loops on a 5.22-mile single-track course with 750 feet of elevation gain per lap, starting and finishing by Greenbrier Lake's sandy shore

Three-loop 50K featuring rugged singletrack climbs, ridge traverses, gorge views, tranquil lake stretches, and 2,600 feet of elevation gain in Rocky Gap State  

Dirt singletrack and rolling hills through Patapsco Valley State Park, with creek crossings, muddy sections, and some paved stretches near Baltimore

Out-and-back single track course through remote, rugged forest, starting and finishing at Point Overlook in Green Ridge State Forest, western Maryland.

50 miles on the Seneca Greenway and Muddy Branch trails, with rolling forested singletrack, small stream crossings, and occasional muddy footing.

Late-autumn 50K in Rosaryville State Park: mostly singletrack through deep woods and open meadows, with a looped perimeter-trail format.

Well-established 50-mile course renowned for challenging endurance and stamina

Gentle rolling terrain, short steep climbs, and scenic woodland singletrack, with brief road and open-field sections.

Self-supported endurance run on an unmarked course, following a no-fees, no-aid, no-awards philosophy in support of Annapolis Light House Shelter

Six-loop 50k course on scenic wooded trails at Rockburn Branch Park, solo or relay, with flexible team and distance options.

Aid-supported overnight 50k through secretive routes, immediately followed by the Algonquin 50k for a combined 100k+ challenge

Scenic, flat 50k route through Chesapeake and Pocomoke forests on Maryland's Eastern Shore, 95% trails with single-track and wide paths

Shaded 4.3-mile singletrack loop in Little Bennett Regional Park, with 5- and 9-hour timed formats and on-course aid station in Clarksburg, MD

Varied 50 km course with singletrack, woods roads, fields, gravel and brief asphalt through forest, meadows and farmland views.

Single track dirt paths and gravel roads circling Saint Mary's Lake, forested scenery, 10.5-mile loop, about 500 feet of elevation gain per lap

Scenic 6-mile single track loops through Little Bennett Park, gentle terrain, flexible distance, and on-course aid station support

Single-track trails along Seneca Creek with muddy, rocky, rooty, and hilly sections through Seneca State Park’s scenic woodlands