Book your event or guest house reservation today! Call or email 301-573-7510 / [email protected]. Site visits by appointment only. Famous for DC destination weddings, historic event spaces for social events and business meetings, as well as private Guest House lodging and cabins. Across the street from the C&O Canal National Park, Rockwood Manor is the perfect getaway for adventurers hiking, biking, or kayaking along the famous towpath. Only 6 minutes off the DC Capital Beltway, but you'll feel like you're tucked away in the woods far from the stresses of DC area. As an M-NCPPC/Montgomery Parks property, we offer what most hotels cannot -- a private, unique, nature-focused experience in the heart of Potomac, Maryland.