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Story summary
- Surveyors measured Mont Blanc’s summit at 4,807.47 metres, 1.29 metres lower than in 2025.
- UNGE and the Ordre des Géomètres-Experts mapped the peak using satellite data and drones.
- The summit has fallen 3.43 metres since its 2007 height of 4,810.90 metres.
- Swiss glaciologists reported a 20% ice loss nationally over five years and a 5.5% volume drop in 2025-2026.
