Official source verifies 23km du Mont-Blanc 2026 on 2026-06-27 in Chamonix-Mont-Blanc, France. Official race page lists Saturday, June 27, 2026, 8:00 start, 23 km distance and 1680m+; official homepage says Mont-Blanc Marathon weekend has 10,000 runners and all 2026 events except Mini-Cross are fully booked.
Date
27 juin 2026
Distance
—
Elevation
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Difficulty
Difficile