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Smallwood State Park, along a tributary of the Potomac River, offers a unique mix of historical significance and modern-day boating conveniences. The 628-acre park is named after General William Smallwood, a Revolutionary War officer who was the fourth governor of Maryland. His plantation house, called Smallwood's Retreat, has been restored and is open to visitors. The house reflects Smallwood's lifestyle as a 18th century gentleman planter.
The park also offers a marina, boat-launching ramps, a picnic/camping area, and nature trails. Located on the Mattawoman Creek, the marina provides excellent access to fishing on the Potomac River, which is just a mile away. Smallwood also hosts craft demonstrations, military exhibitions, and other special events throughout the year.