The boat ramp named Old State Highway 66 Rowlett is located in the city of Rowlett, Texas. According to the latest information available, it is a public boat ramp that provides access to Lake Ray Hubbard.

The width of the boat ramp is not specified; however, it is mentioned that it has two concrete lanes for launching and retrieving boats. This means that it can accommodate multiple vehicles and boats at the same time.

As for the kind of boats that are permitted on the water, it is mentioned that motorized boats, sailboats, and paddlecraft are allowed on Lake Ray Hubbard. However, it is important to note that there may be restrictions or regulations depending on the size, speed, and type of watercraft.

In summary, the Old State Highway 66 Rowlett boat ramp is a public boat ramp located in Rowlett, Texas that provides access to Lake Ray Hubbard. It has two concrete lanes for launching and retrieving boats and permits motorized boats, sailboats, and paddlecraft on the water.