Grande Ruine, Mountain peak in Dauphiné Alps, France

Grande Ruine is a mountain in the Écrins massif of the Dauphiné Alps, with two separate summits divided by the brèche Giraud-Lézin: Pointe Brevoort to the south at 3,765 m, the highest point, and Pic Maître to the north at 3,728 m. Its upper part is bare grey rock ending in sharp, uneven spires, with patches of snow or ice in the gullies and fans of grey scree running down toward the valley floor.

Meta Brevoort, William Auguste Coolidge and four guides made the first ascent of Pointe Brevoort on 19 July 1873 by what is now the normal route. Pic Maître followed on 29 July 1887, climbed by J. Maître with Pierre Gaspard fils and Maxime Bourbon. Félix Germain climbed the 700-metre north face of Pic Maître on 6 August 1938, and Bruno Thévenon opened a route on its west pillar on 20 September 1964.

The name Grande Ruine ("great ruin") refers to the mountain's broken, collapsing rock faces. Its two summits are separated by the Brèche Giraud-Lézin, and the southern Pointe Brevoort is named after Meta Brevoort, who made the first ascent in 1873. The normal route from the Adèle Planchard refuge is a popular classic, also done on skis.

Access to the summit typically begins from a mountain shelter located east of the peak. Visitors should be prepared for steep terrain, changing conditions, and a substantial climbing duration.

The mountain displays a prominence of 496 meters and maintains an isolation distance of 4.41 kilometers from the nearest higher summit.