The Piton des Neiges is a 3,069 m (10,069 ft) shield volcano on Réunion, one of the French volcanic islands in the Mascarene Archipelago in the southwestern Indian Ocean. It is located about 800 kilometres (500 mi) east of Madagascar. Piton des Neiges is the highest point on Réunion and is considered to be the highest point in the Indian Ocean. The volcano was formed by the Réunion hotspot and emerged from the sea about two million years ago. Now deeply eroded, the volcano has been inactive for 20,000 years and is surrounded by three massive crater valleys, the Cirques. The Piton des Neiges forms the northwestern two-thirds of Réunion, with the very active Piton de la Fournaise comprising the rest. As its name suggests, snow is occasionally seen on its summit in winter. The Piton des Neiges is ranked 14th in the world by topographic isolation.

Réunion, officially Department of Réunion, is an island in the Indian Ocean that is an overseas department and region of France. Part of the Mascarene Islands, it is located approximately 679 km (422 mi) east of the island of Madagascar and 175 km (109 mi) southwest of the island of Mauritius. As of January 2024, it had a population of 885,700. Its capital and largest city is Saint-Denis.