Seneca Creek State Park offers over 6,000 acres of natural, recreational opportunities, extending along 14 scenic miles of Seneca Creek, as it winds its way to the Potomac River. The Clopper Day-Use Area contains the 90-acre Clopper Lake, surrounded by forests and fields. A restored 19th-century cabin and a self-guided path interpret the history of the area. Nearby, the Schaeffer Farm Trail Area offers 12 miles of marked trails for hiking and mountain biking, and the 16.5-mile Seneca Creek Greenway Trail follows the entire course of the river. During May, the Schwartz peony gardens and field plants are in bloom. Activities and amenities include hiking and biking trails, boat rental, fishing, flatwater canoeing and kayaking, hunting, picnicking, playgrounds, riding trails, picnic pavilions, cross-country skiing, a disc golf course, and vending refreshments.