The Lac Blanc reflection
Mont Blanc inverted on the water in the morning.
Guilhem Vellut from Annecy, France — CC BY 2.0 · Tiia Monto — CC BY-SA 3.0 · Tiia Monto — CC BY-SA 3.0 · Tiia Monto — CC BY-SA 3.0
From the **La Flégère** lift station: about **two to two and a half hours** up and roughly the same down, with around 550 metres of ascent. The path is clear and waymarked but **rocky and steep in places**, with metal ladders fixed into the rock on the last section. Walking up from the valley instead adds about a thousand metres and **three more hours** — an option for the trained only. Plan a full day including time at the lake, and don't start the climb in the afternoon.
You need three conditions together. **The season**: late July to September — before that the lake is frozen or snow-covered with no reflection at all, and this is what most disappoints people who climb in June. **The time**: **early morning**, before the wind gets up, because the slightest ripple erases the reflection; anyone sleeping at the Lac Blanc refuge shoots at dawn. **The weather**: clear sky over Mont Blanc specifically — the lake can be in sunshine while the summit sits in cloud. Patience is part of the equation.
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The range standing **opposite** Mont Blanc on the northern side of the Chamonix valley, named for rock that reddens in the evening light. It has been a **nature reserve** since 1974, covering thousands of hectares, with ibex, chamois, marmots and alpine flowers. Its value to a visitor is that it is **the right side to look from**: to photograph Mont Blanc you need to be facing it rather than standing on it, and the Aiguilles Rouges is that place. From its paths you see the whole massif — Mont Blanc, the Aiguille du Midi, the Mer de Glace — laid out in front of you. Its most famous feature is **Lac Blanc**, a mountain lake at about 2,350 metres whose reflection of Mont Blanc is the single most photographed image in the French Alps. You reach it on foot, climbing from the **La Flégère** cable car or from the valley, two to three hours from the lift station. ⚠ The lake stays **covered in snow and ice into early summer** — anyone climbing in June may find it white with no reflection at all. Its best months are **late July to September**.
Mont Blanc inverted on the water in the morning.
Ibex, chamois and marmots inside the reserve.
The whole massif laid out across the valley.
Réserve naturelle des Aiguilles Rouges, 74400 Chamonix