Science & Tech · Science & Environment · 1 hr ago
Mont Blanc measures 4,807.47 meters, nearly two meters taller than in 2023
Mont Blanc measured 4,807.47 meters tall in a survey conducted last month in the French Alps.
That is 1.88 meters higher than in 2023, when the mountain was measured at a lower height.
The rocky summit is about 4,792 meters above sea level, while its ice and snow cover varies with wind and weather.
In 2023, the mountain had shrunk by over two meters compared with the 2021 measurement.
Experts say the summit has not been significantly altered by climate change so far.
Surveyors have measured Mont Blanc every two to three years since 2001, and they will analyze measurements over time to study possible effects of climate change on the Alps.
Mont Blanc was measured at 4,807.47 metres above sea level, nearly 1.9 metres higher than in 2023.
The latest reading is about 1.3 metres lower than the measurement recorded in 2025.
Surveyors said changing snow and ice, affected by snowfall, wind and temperatures, drive year-to-year shifts in the summit’s height.
The mountain’s rocky peak is about 4,792 metres high, while its snow and ice cap varies.
Experts said individual height changes do not by themselves show whether the mountain has gained or lost ice mass.
- Who
- Surveyors from Haute-Savoie measured the mountain. The expedition also included guides and scientists.
- What
- Mont Blanc was measured at 4,807.47 metres, 1.88 metres higher than its 2023 reading.
- When
- The measurement was taken on September 17, 2026, and announced on October 14.
- Where
- Mont Blanc, in the French Alps.
- Why
- Surveyors make repeated measurements to build data about changes to the summit and their possible links to climate change.
This story does not have two clearly opposing sides.
Mont Blanc was measured at a height 1.88 metres below the latest reading.
Surveyors, guides and scientists reached the summit at daybreak and took measurements for more than two hours.
French surveyors announced the new measurement of 4,807.47 metres.
- Latest measured height
- 4,807.47 metres
- Difference from 2023
- 1.88 metres higher
- Difference from 2025
- 1.29 metres lower
- Rock peak height
- About 4,792 metres
- Expedition date
- September 17, 2026
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What people are saying
Each individual measurement is not significant in itself
not been significantly altered by climate change
An increase in summit altitude does not necessarily mean that the mountain has gained ice mass, nor does it contradict the documented retreat of Alpine glaciers.