The boat ramp named J Hart Clinton Drive is located in San Mateo, California at the coordinates of latitude 37.56980515 and longitude -122.29059601. This boat ramp is a concrete ramp that provides access to the waters of the San Francisco Bay. It is approximately 15 feet wide and is suitable for small to medium-sized boats.

The J Hart Clinton Drive boat ramp provides access to the San Francisco Bay, which is a large body of water that spans across several counties in Northern California. This body of water is home to a diverse range of marine life, including fish, sea birds, and mammals such as seals and sea lions.

As for the kind of craft that are permitted on the water, the San Francisco Bay is open to a variety of recreational boats, including sailboats, motorboats, kayaks, and paddleboards. However, it is important to note that certain areas of the bay may have restrictions on the type of craft that are allowed, and boaters are advised to check for any regulations or restrictions before heading out on the water.

Overall, the J Hart Clinton Drive boat ramp provides a convenient and accessible launch point for boaters looking to explore the San Francisco Bay and its surrounding areas.