Based on the latest information available, the boat ramp named Rock Lake - North End Launch is located on Park Lane Rd in Wisconsin and is open to the public. It is a concrete boat ramp that is quite wide, measuring approximately 24 feet in width.

The Rock Lake boat ramp services Rock Lake, a popular recreational body of water in Jefferson County, Wisconsin. This lake is approximately 1,371 acres in size and is famous for its clear water and abundant fish population. It is a popular spot for boating, fishing, and other water-based activities.

The boat ramp is suitable for a variety of watercraft, including motorized boats, sailboats, kayaks, and canoes. However, it is important to note that all watercraft must comply with Wisconsin's boating laws and regulations, including proper registration and safety equipment.

Overall, the Rock Lake - North End Launch boat ramp is a great facility for anyone looking to enjoy the waters of Rock Lake in Wisconsin.