Mazerin, Mountain summit in Réunion, France.

Mazerin is a summit reaching 2,092 metres on the Piton des Neiges massif on Réunion. Its upper ridge runs nearly horizontal before dropping steeply on the right into deep vertical grooves. Below the ridge, bare dark grey volcanic rock slopes gently left, while the lower slopes facing front are covered in green vegetation cut by steep ravines.

Mazerin lies on the mountain rampart of the Piton des Neiges massif, the summit that separates the Plaine des Lianes plateau above from the forests of Bélouve and Bébour below. It rises to 2,092 m and marks the boundary between the communes of Bras-Panon to the north and Saint-Benoît to the south. On 20 March 1985 the summit was included in a state biological reserve of about 2,000 hectares.

Mazerin lies on the boundary between Bras-Panon and Saint-Benoît, and its slopes fall toward the Plaine des Lianes, the Forêt de Bélouve and the Forêt de Bébour. Since 20 March 1985 the summit has been included in a state biological reserve of about 2,000 hectares, so the mountain is known to islanders as a protected site rather than a climbing destination.

Access requires careful preparation and appropriate equipment, as conditions at elevation can change rapidly and weather is unpredictable. Visitors should start early, bring sufficient water, and be prepared for sudden rain and strong winds.

Mazerin lies on the mountain wall of the Piton des Neiges massif, where the Plaine des Lianes plateau drops steeply toward the forests of Bélouve and Bébour. Since 20 March 1985 the summit has stood within a state biological reserve of about 2,000 hectares, spanning the communes of Bras-Panon and Saint-Benoît.