Based on online resources, the boat ramp named County Road 142 in Elkhart County, Indiana is a public boat ramp that provides access to the St. Joseph River. The ramp is reportedly wide enough to accommodate two boats at a time. The body of water it services is the St. Joseph River, which is approximately 206 miles long and flows through Michigan, Indiana, and Ohio.

According to the Indiana Department of Natural Resources, the St. Joseph River is navigable by a variety of watercraft, including motorized boats, canoes, and kayaks. However, there are certain restrictions in place depending on the specific section of the river. For example, certain stretches of the river may have speed limits or restrictions on the use of gasoline-powered motors.

It's important to note that information and regulations regarding specific waterways can change frequently, so it's always a good idea to check with local authorities or visit official websites for the latest updates before planning a boating trip.