Stepps Harbor View Marina is located on Mattox Creek, a couple of miles south of Colonial Beach, just minutes from the open Potomac River on the Virginia side opposite Cobb Island, MD. We are a full service, family run marina that has been in the boating business since 1990. Our family’s business is your family’s fun. We offer covered and uncovered slips and can accommodate boats up to 60-feet in length. All docks include free water service/hook-ups.