Gros Morne, Mountain summit in La Réunion, France

Gros Morne is a summit of Piton des Neiges massif on Réunion, rising to 3,019 m, the island's second-highest peak after Piton des Neiges, whose summit lies 2,200 m to its east-southeast. Its slopes are steep, often with vertical rock faces, and the shield is geologically built of alkaline Pliocene basalts. The summit sits at the quadripoint of Cilaos, La Possession, Saint-Paul and Salazie.

Gros Morne belongs to the Piton des Neiges massif, a volcanic shield built from alkaline Pliocene basalts. Its first recorded ascent dates only to 1939, and the slopes were explored in June 1998 by an expedition led by Pascal Colas. The summit sits 2,200 m west-northwest of the Piton des Neiges peak, near the quadripoint of Cilaos, La Possession, Saint-Paul and Salazie.

The summit sits at the quadripoint where the communes of Cilaos, La Possession, Saint-Paul and Salazie meet, so four municipal territories touch at this point of the Piton des Neiges massif. The name Gros Morne is simply French for "big rounded hill", describing the shape of the peak.

The summit is reserved for alpinists and is very difficult to reach on foot; only a few expeditions, such as Pascal Colas's from 9 to 22 June 1998, have explored the mountain's foothills. The summit lies 2,200 m west-northwest of the Piton des Neiges. The quadripoint of Cilaos, La Possession, Saint-Paul and Salazie is close by.

The first recorded ascent of Gros Morne dates only from 1939, despite the summit being considered not technically difficult. Expeditions such as Pascal Colas's, from 9 to 22 June 1998, explored the mountain's foothills near the quadripoint where Cilaos, La Possession, Saint-Paul and Salazie meet.