The Porcupine Mountains Wilderness State Park is a very big, 60,000 acre (90+ square miles) park in the northwest corner of Michigan's Upper Peninsula. It was named the Porcupine Mountain by First Nations people who thought the ridgelines of these low mountains resembled the backs of porcupines. Maybe so; I didn't see it, but I also haven't seen lots of porcupines. Regardless, this is a pretty exceptional park! It has a lot of wilderness, 70+ miles of hiking trails, about 20 miles of Lake Superior shoreline, a wonderful range of camping opportunities, spectacular scenery with some very nice exposed geology, wintertime cross country and downhill skiing opportunities, frisbee golf, and much more. The park staff described this thing as having three main scenic regions: the Lake of the Clouds features a beautiful mountain lake and an escarpment; the Summit Peak offers panoramic views of the park from its highest point and provides access to Ridge trails in the middle of the park; the Presque Isle section on the western end offers a waterfall hike along the Presque Isle River and apparently serves up some pretty exciting Class V kayaking when the water levels are up! I visited each area and sampled some of the trails recommended by the park ranger who got me oriented and organized. This is a pretty great park! With more time, I'd add a Lake Superior shoreline paddle and a hike up to Mirror Lake. I chatted with a couple who back country camped next to the lake for two nights, and they were raving about how wonderful it was!