The Tour du Mont Blanc (TMB) is one of Europe's most iconic long-distance treks, circumnavigating the Mont Blanc massif through France, Italy, and Switzerland with roughly 10,000m of total elevation gain across rugged Alpine passes, glacier viewpoints, and charming mountain villages. Hikers cross high cols such as the Grand Col Ferret and Col de la Croix du Bonhomme, experiencing dramatic scenery ranging from lush valley meadows to rocky ridgelines above 2,500m. Early July brings warm valley days with a risk of afternoon thunderstorms, lingering snow bridges on higher passes, and wildflowers in full bloom — making for a spectacular but weather-variable itinerary.