After conducting research, there appears to be multiple Cottonwood Lake boat ramps in Minnesota. However, based on the given coordinates, the most likely Cottonwood Lake boat ramp is located in Itasca County, Minnesota.

According to the Itasca County website, the Cottonwood Lake boat ramp is a concrete ramp with a width of 16 feet. It services Cottonwood Lake, which is a small lake located in the Chippewa National Forest. The website also states that the lake is open to motorized and non-motorized watercraft, but there are restrictions on boat motor size.

It is important to note that the information provided is based on the latest available information and may be subject to change. It is recommended to check with local authorities or the managing agency for the most up-to-date information before using the boat ramp or accessing the body of water.