Widely known in Europe, the TMB is a 170-kilometre hike that encircles the Mont Blanc massif, which at 14,500 feet is the highest peak in the European Alps. The hike begins in Chamonix, France (among other starting points), and then continues over 12 days through alpine areas of France, Italy and Switzerland before ending back in Chamonix. Throughout the course of the 170 kiloemetres, the trail offers about 30,000 cumulative feet of ascent and descent as it winds its way through numerous mountain passes.
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Photo: Andrew Wilson