The John Downs Loop 8311 boat ramp is located in Anne Arundel County, Maryland. According to the latest information available, it is a concrete boat ramp that is 20 feet wide and has an adjacent parking area for vehicles and trailers. The ramp provides access to the South River, which is a tidal river that flows into the Chesapeake Bay.

The South River is a popular location for recreational boating, fishing, and crabbing. The John Downs Loop 8311 boat ramp is suitable for launching small to medium-sized boats, including kayaks, canoes, stand-up paddleboards, and powerboats. However, there may be restrictions on the size and horsepower of motorized boats that are allowed on the river, so it is recommended to check with local authorities before launching.

Overall, the John Downs Loop 8311 boat ramp is a convenient and well-maintained facility that provides easy access to the South River for boaters and water enthusiasts in Anne Arundel County, Maryland.