Peninsula is a state park golf course in Door County between Ephriam and Fish Creek. The original course from the 1920s was just nine holes and was expanded over the years with a redesign in the 1960s by Larry Packard.

The course is a traditional, style 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.