The Potomac Shores to St. Mary's River paddling route spans 17 kilometers along Maryland's scenic Potomac River waterfront near Tall Timbers. Paddlers can explore the confluence of the St. Mary's River with the Potomac, enjoying calm waters, abundant wildlife, and historic shorelines including views near Colonial Beach. This flatwater route is ideal for intermediate paddlers seeking a full-day adventure through one of Maryland's most beautiful coastal waterways.