The park is open during daylight hours.  Some of the park's six visitor centers operate on a seasonal schedule.  Contact one of the visitor centers for current hours of operation.

Georgetown:  1057 Thomas Jefferson St., NW, Washington, DC 20007 202-653-5190

Great Falls Tavern:  11710 MacArthur Blvd, Potomac, MD 20854 301-767-3714

Brunswick:  40 West Potomac Street Brunswick, MD  21716 301-834-7100

Williamsport:  205 W. Potomac St., Williamsport, MD 21795 301-582-0813

Hancock:  326 E. Main St., Hancock, MD 21750 301-678-5463

Cumberland:  Western Maryland Railway Station, Room 100, 13 Canal St., Cumberland, MD 21502 301-722-8226