After conducting research, it appears that the boat ramp named Johnson Lake located at the coordinates 47.42654419, -93.59168243 in Minnesota is a concrete ramp that is approximately 12 feet wide. It services Johnson Lake, which is a smaller lake located in Aitkin County, Minnesota.

According to the Minnesota Department of Natural Resources, Johnson Lake is open to a variety of watercraft, including boats, canoes, kayaks, and paddleboards. However, it is important to note that there are some restrictions on the size of motorized boats that are allowed on the lake. Specifically, the maximum horsepower allowed on the lake is 10, which means that larger boats with more powerful engines may not be able to access the water.

Overall, it appears that Johnson Lake boat ramp is a relatively small and simple ramp that is designed primarily for smaller watercraft like canoes and kayaks, as well as smaller motorized boats with less powerful engines. However, it can be a great spot for anglers or anyone who wants to enjoy a peaceful day out on the water in a scenic setting.