Mont Blanc du Tacul, Arête du Diable, 4248 m, D+, +1200 m
- Activity: classic mountaneering
- Summit: Mont Blanc du Tacul
- Height: 4248 m
- Route: Arête du Diable (Devil's ridge)
- Difficulty: D+ difficult with plus
- Hut: Refuge des Cosmiques, 3613 m
- Cable car: Aiguille du Midi
- Parking: Chamonix
- Approach: 2 hours
- Ascent: 6 - 8 hours including descent
- From hut: +1200 m
- From parking: +1200 m
- Season: summer