Set in the remote forests of northern Maine, Baxter State Park centers on Mt Katahdin (5267ft), Maine's tallest mountain and the northern terminus of the 2175-mile Appalachian Trail . This vast 204,733-acre park is maintained in a wilderness state - no electricity and no running water (bring your own or plan on purifying stream water) - and there's a good chance you'll see moose, deer and black bear. Baxter has extensive hiking trails, several leading to the top of Mt Katahdin, which can be hiked round-trip in a day as long as you're in good shape and get an early start.