Based on the latest information available, the boat ramp named Forest Hill Road Lake Ridge is located in Prince William County, Virginia. It is a public boat ramp designated for recreational use. The coordinates of the ramp are latitude: 38.68611908 and longitude: -77.28659821.

The boat ramp is considered to be a standard concrete ramp with a width of approximately 20 feet, providing ample space for boats to be launched and retrieved. The ramp has a moderate slope suitable for different types of boats. The area around the ramp is well-maintained and provides ample parking spaces for boat trailers.

Forest Hill Road Lake Ridge boat ramp services the Occoquan Reservoir, which is a 2,100-acre lake created by the Occoquan Dam. The lake is popular for recreational activities such as fishing, boating, and jet skiing. The Occoquan Reservoir is a source of drinking water for the Northern Virginia region, and as such, the area around the ramp and on the lake is patrolled by authorities.

A variety of watercraft are permitted on the Occoquan Reservoir, including motorized boats, canoes, kayaks, sailboats, and paddleboards. Boaters are required to have a valid Virginia Department of Wildlife Resources boating license and follow all state regulations. Also, the use of personal watercraft is prohibited on the reservoir.

In conclusion, the Forest Hill Road Lake Ridge boat ramp is a well-maintained public ramp located in Prince William County, Virginia. It services the popular Occoquan Reservoir and offers ample parking and a standard concrete ramp suitable for different types of boats. A variety of watercraft are permitted on the reservoir, and boaters are required to follow all Virginia state regulations.