About mountain biking in St. Mary's County

St. Mary's County, Maryland has 18 named trails tagged for mountain biking, covering 31.3 miles, an average of 1.7 miles each. The longest is Three Notch Trail, at 12.4 miles. 2 run 5 miles or longer.

All 18 mountain biking trails, longest first

Three Notch TrailMTB12.4 mi White TrailHikeMTB6.8 mi Forest RoadHikeMTB1.9 mi Western Branch RoadHikeMTB1.8 mi Bell Lap TrailHikeMTB1.5 mi Pine TrailHikeMTB1.5 mi Cross TrailHikeMTB1.0 mi Green TrailHikeMTB0.7 mi Road Less TraveledHikeMTB0.5 mi Old Yellow trailHikeMTB0.5 mi West Lake TrailHikeMTB0.4 mi Plantation TrailHikeMTB0.4 mi Canal PathHikeMTB0.4 mi Plantation Trail Deer Track BranchHikeMTB0.4 mi MudbypassHikeMTB0.3 mi Pond TrailHikeMTB0.2 mi North Pine TrailHikeMTB0.2 mi Pine Trail AccessHikeMTB0.1 mi

← All St. Mary's County trails

Trail geometry from OpenStreetMap contributors, licensed ODbL. Elevation from the USGS 3D Elevation Program. Compiled and published by Trailmonger · trail data last rebuilt August 23, 2026.