Based on the latest information available, the boat ramp named Sheboygan River Lake Michigan - Access at Kiwanis Park Rd Sheboygan in Wisconsin is a concrete ramp that offers access to Lake Michigan via the Sheboygan River. The ramp is approximately 30 feet wide, providing ample space for multiple boats to launch and retrieve at the same time.

As the name suggests, this boat ramp services the Sheboygan River, which flows into Lake Michigan. Therefore, only watercraft that are permitted on the lake are allowed to use this ramp. This includes a range of vessels such as powerboats, sailboats, kayaks, canoes, and fishing boats.

It is important to note that regulations and restrictions can change over time, so it is advisable to check with local authorities or the Wisconsin Department of Natural Resources for the latest information regarding the use of this boat ramp and the types of watercraft allowed.