Hit the rugged, dusty, spectacular road.
1. Tour du Mont Blanc — France, Italy, Switzerland
Length: 105 miles (170 km), seven to eleven days
Difficulty: Moderate to strenuous
When to go: July–September
The TMB is considered Europe’s classic long-distance walk, and therefore also one of its most popular ones. The loop circles Mont Blanc, the highest peak in the Alps, and passes through sections of exposed rock, wildflower plains, and views of awesome glaciers. The distance covered every day can be relatively low, but the significant climbs and drops (when combined, roughly 33,000 feet) can make those days pretty strenuous. Camping is permitted, but the route offers plentiful accommodation — and according to experienced hikers, exploring the villages along the way is part of the fun.