You searched for: Institution University of Michigan. Libraries Remove constraint Institution: University of Michigan. Libraries Place About 1 1/4 miles south west of the Rock Harbor Campgrounds along the trail which parallels the shore of Rock Harbor Remove constraint Place: About 1 1/4 miles south west of the Rock Harbor Campgrounds along the trail which parallels the shore of Rock Harbor Place Michigan Remove constraint Place: Michigan Topic Usnea Remove constraint Topic: Usnea