West Upper Bay Land use GIS map West Upper Lake is located on the western end of Lake Minnetonka. The lake is about 879 acres (though it's difficult to draw the lines between West Upper, Cook's, and South Upper Lake) and has a maximum depth of 84 feet (average depth is 13 feet). There are about 90 homes along the shoreline, all of which are sewered. Note: The West Upper unit was moved to Medicine Lake in 2001. We will continue to post data collected by Hennepin Parks as it becomes available.