165 miles of scenic hiking trails crisscross the island, 99 percent of which is protected wilderness. Wolves and moose roam free, historic lighthouses spread along the rugged coastline, and opportunities to spot shipwrecks and wildlife abound. Untouched by the outside world, Isle Royale is a paradise for backpackers and day hikers alike. There is no means of transportation on the island, and the only way to access it is by ferry. Overnight stays are possible (and recommended) in both campgrounds and rustic log cabins. Go in the fall to avoid the mosquitoes.
Montana: Glacier Park
Glacier Park may offer some of the most extraordinary fall colors in the country –Reds, golds, and pinks mix with the incredible wildflower variety in the area. Cross paths with big horned sheep and mountain goats, and watch the grizzlies from the distance. Stay overnight at the Granite Park Chalet, a rustic lodge almost a century old. Only accessible by foot, the chalet is a lesson in backcountry charm.
New Hampshire: Mount Washington
The highest peak in the northeastern U.S. tops at 6,288 feet and has the world record for wind speed (231 MPH) and a reputation for severe weather. Snow is possible any month of the year, and changes in weather are usually so sudden that it's easy to get caught off-guard in the middle of a hike. There are several trails that can take you to the summit, but be warned that none of them are easy. Rocky, steep and wet, they are not for the untrained hiker. Loose rocks make the way downhill even harder. The Great Gulf Trail is the steepest trail,rising 1,600 feet in less than a mile. Tuckerman's Ravine is the most popular trail because it's slightly easier than the others, with breathtaking views along the way. The trails are always crowded in summer, as Mt. Washington is a top hiker's destination. For solitude, choose the steepest climbs.