Based on the latest information available, the boat ramp named Lake Onalaska Mississippi River - Fishermans Road is located in Wisconsin and services the Lake Onalaska area of the Mississippi River. This boat ramp is open to the public and can accommodate a variety of watercraft, including fishing boats, kayaks, canoes, and other similarly sized vessels.

The Lake Onalaska boat ramp is well-maintained, with a concrete surface that allows for easy launching and retrieval of boats. The ramp is also wide, with an overall width of approximately 20 feet, which means that it can accommodate a variety of boat sizes without any issues.

Moreover, the boat ramp is located in a beautiful area overlooking Lake Onalaska at Fisherman's Road, and it is widely used by local fishermen and other boaters who want to explore the many miles of waterways in the region. The boat ramp is also equipped with a large parking lot, which provides ample space for vehicles and boat trailers.

In conclusion, the Lake Onalaska Mississippi River - Fishermans Road boat ramp is a popular and well-maintained facility that can accommodate various types of watercraft. It services the Lake Onalaska area of the Mississippi River and is open to the public. The ramp is wide and equipped with a concrete surface, making it easy to launch and retrieve boats.