 Downstream of Route 35 are several marinas, although since both the bridge at Route 35 and that at County Route 6 have a low clearance, vessels with masts must remain downstream of County Route 6.From Route 35 to the mouth Matawan Creek forms the boundary between Aberdeen Township and Keyport Borough.There are no further bridges downstream of County Route 6 and Matawan Creek empties into Keyport Harbor, an arm of Raritan Bay.