The perfect place to keep your boat near Washington DC. Occoquan Harbour Marina is located on the Occoquan River, 3.7 miles from the Potomac River. Our boat slips offer deep water 9' average at low tide. Transient Slips are welcome too! You will enjoy floating docks, lift slips, BBQ Grills, Slip Holder Pavilion and much more. We are a full-service marina; which means we can perform boat repairs, haul outs, fiberglass repair, boat prop repair, boat engine repairs and winterization services. The Town of Occoquan is a short ride away. The town offers shopping, restaurants and a museum.