Lac Miroir, Alpine lake in Ceillac, France.

Lac Miroir is an alpine lake in the French Alps sitting at about 2200 meters elevation, where the water surface reflects the surrounding mountain peaks. The lake occupies a remote high valley surrounded by steep slopes and alpine meadows.

Lac Miroir lies at 2,215 metres in the commune of Ceillac, in the Queyras regional park of the Hautes-Alpes, on the route of the GR 5 long-distance trail. It sits below Lac des Rouites and Lac Sainte-Anne. The sources record no shepherding origin or 17th-century trail building for the lake.

The lake serves as a landmark along the GR5 hiking trail, a long-distance path that brings walkers through the Alps on their journey between distant regions.

The hike from the Pied du Mélezet parking area takes about two hours and follows marked trails with steady elevation gain. The paths are generally well-maintained during the hiking season, though the altitude and mountain weather require good physical preparation.

The lake's other name, lac des Prés Soubeyrand, is rarely used on maps, and it sits just below two higher lakes, lac des Rouites and lac Sainte-Anne, on the GR 5 route through the Queyras regional park.