As per "An Ice Climber's Guide to Munising Michigan," 28 miles of shoreline, much of it 60m cliffs, a mile off shore of the mainland. Inaccessible unless the ice over the channel is sufficiently formed, or unless you have a boat.

The Local Guidebook, An Ice Climber’s Guide to Michigan’s Upper Peninsula, by local climbers Bill Thompson, Jon Jugenheimer, and Matt Abbotts, is a MUST HAVE resource. Buy a copy. downwindsports.com/guiding/…