According to the Anne Arundel County website, Seaward Drive 504 boat ramp is a public boat ramp located on the Magothy River in Arnold, Maryland. It is a concrete boat ramp that is 18 feet wide and can accommodate up to two boats at a time.

The ramp provides access to the Magothy River, a tidal river that flows into the Chesapeake Bay. Boats of all types are permitted on the river, including powerboats, sailboats, kayaks, and canoes. The river is popular for recreational boating, fishing, and crabbing.

The information was last verified on the Anne Arundel County website on September 9, 2021.