After thorough research, I could not find any information on a boat ramp named North Main Street 364 in Underwood, Minnesota. It is possible that the ramp has a different name or that it does not exist.

However, I can provide general information about boat ramps in Minnesota. Boat ramps can vary in size and shape, but are typically made of concrete or asphalt and have a slope that allows boats to be launched into the water. The width of a boat ramp depends on its popularity and the size of the body of water it services.

Minnesota has over 11,000 lakes and countless rivers and streams, providing ample opportunities for boating and fishing. The type of watercraft permitted on a particular body of water can vary depending on local regulations, so it is important to check with the managing agency or local authorities before heading out on the water. Common types of watercraft in Minnesota include motorboats, sailboats, canoes, and kayaks.

Overall, while specific information about the North Main Street 364 boat ramp could not be found, Minnesota offers a diverse range of waterways and opportunities for boating and fishing.