•Park Hours: 8 AM to sunset April - October 10 AM to sunset November - March Open all year except Christmas Day Veterans can enter for free, as well as children in car seats. •Weekends and Holidays, Memorial Day weekend through Labor Day: There is a $5 per person service charge ($7 per-person for non-Maryland residents) for entrance into the Hammerman Area. •Weekends an Off-season (after Labor Day to the Friday before Memorial Day weekend): A $3 per-vehicle ($5 for non-Maryland •Lifeguards are on duty from Memorial Day through Labor Day weekend, 8 a.m. to 5p.m