According to the official website of the Maryland Department of Natural Resources, the Piney Point Road boat ramp in Saint Mary's County is a concrete ramp that provides access to the Potomac River. The ramp is approximately 15 feet wide, accommodating most types of small to medium-sized watercraft such as jon boats, bass boats, and small motorized vessels.

The Piney Point Road boat ramp is located on the western shore of the Potomac River, about 18 miles south of the Harry Nice Memorial Bridge. The ramp is specifically located in Piney Point, Maryland, and is accessible by taking Piney Point Road towards the Potomac River. The ramp provides easy access to the waters of the Potomac River, which is well-known for its scenic beauty and recreational opportunities.

In terms of regulations, the Maryland Department of Natural Resources requires that all watercraft using the Piney Point Road boat ramp have a valid registration and display the required safety equipment such as life jackets, lights, and sound-producing devices. Additionally, the department has set speed limits and wake restrictions on certain areas of the river to ensure public safety and protect the natural environment.

Overall, the Piney Point Road boat ramp in Saint Mary's County, Maryland, is a well-maintained concrete ramp that provides access to the beautiful waters of the Potomac River. It can accommodate most types of small to medium-sized watercraft, and operates under strict safety regulations to ensure the safety of all users.