Peninsula is a state park golf course between Ephriam and Fish Creek in Door County. The original course of nine holes in the 1920s, was expanded over the years, and Larry Packard redesigned it in the 1960s.

The course is a traditional layout carved through the woods with views out over Eagle Harbor. It's a scenic setting without homes or development along the narrow fairways and frequent doglegs, with sand traps primarily guarding the greens. It's rather short at 6,300+ yards, 69.8/123 course/slope ratings from the blue tees with three shorter tees.