After conducting research, I was unable to find any information specifically about a boat ramp named State Highway M Bosworth in Missouri. It is possible that the name has been changed or it may be a local name that is not widely recognized.

Without further information, it is impossible to determine the kind of boat ramp, width, body of water it services, or what kind of craft are permitted on the water. It is important to note that before launching a boat, it is crucial to research the specific boat ramp and waterway to ensure that it is safe and legal to do so. Additionally, it is important to abide by all boating regulations and laws in the area.