According to the latest information available, the boat ramp named Rock Lake - Mill Pond Rock Lake Access is located in Lake Mills, Wisconsin. It is a concrete boat ramp that provides access to Rock Lake, a popular recreational and fishing destination in the area.

The ramp is reportedly 20 feet wide and has a maximum water depth of around six feet. It can accommodate a variety of watercraft, including fishing boats, kayaks, canoes, and pontoons. However, there may be size and horsepower limitations in place, so it's important to check with local authorities before launching any craft.

Overall, the Rock Lake - Mill Pond Rock Lake Access boat ramp offers a convenient and safe way for visitors to enjoy all that Rock Lake has to offer. Whether you're looking to fish, paddle, or just enjoy a day out on the water, this ramp is a great place to start.