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Patapsco Valley State Park: Woodstock Area, Maryland
One of Maryland's best trails, Old Main Line is located near Patapsco Valley State Park: Woodstock Area, MD. Trails' printable online topo maps offer shaded and un-shaded reliefs, and aerial photos too. Use topographic maps to find elevation, print high resolution maps, save a PNG, or just learn the topography around Old Main Line. You can also get free latitude and longitude coordinates from the topographical map and set your GPS. Premium members can download or print any topo and cover more terrain when you map your Old Main Line route ahead of time.