Trou aux Cerfs (also known as Murr's Volcano) is a dormant, crater lake, cinder cone volcano with a well-defined cone and crater. It is 605 m (1,985 ft) high and located in Curepipe, Mauritius. The crater has been alternately described as 300 and 350 meters in diameter, and is 80 meters deep.

The crater was formed less than 2 million years ago in the second phase of volcanic activity that created Mauritius.

According to experts, the volcano is currently dormant but could become active at any time within the next thousand years. It last erupted 700,000 years ago.

Currently, the only mammals living on the volcano are the long-tailed macaque (Macaca fascicularis) and the fruit bat (Pteropus niger).

Lots of exotic birds are found here, including the red fody (Foudia madagascariensis), but the endemic bird species are the martin (Phedina borbonica) and the swiftlet (Aerodramus francicus).

Two species of the genus Trochetia are found here. They are Trochetia blackburniana and the very rare Trochetia triflora.

The most common exotic tree found here is the pine tree (Pinus massoniana), but the endemic plants include the manglier (Sideroxylon puberulum) and the fanjan (Alsophila sp)

(Aside Trou aux Cerfs)

This volcano is 507m high. It is a shield volcano. Having a deep crater, it is dormant. It is also known as Ripailles hill. From it, you’ll see Alma hill, another volcano.

It is 570m high. It is a cinder cone volcano. This volcano also has a deep crater and is extinct. It is near Ganga Talao, a volcano.

Ganga Talao, also known as Grand Bassin, is an extinct volcano and a crater lake volcano. It is 560m high. It is a major Hindu pilgrimage site.

As the crater has been filled with water, it is a crater lake volcano. It is extinct. When it erupted long ago, it created the valleys of La Vallee des Couleurs nature park.

Mount Piton is the highest hill in the North with it being 267m high. It is a shield volcano and an extinct volcano. The crater is located where a small forest is found.

The Mount is close to Mount Piton. It is 162m high. It is covered with sugarcane fields.

Near Belle vue Harel, it is 142m high. It is now the “Domaine de Hillside” where people live.

It is near Butte aux Papayes hill with it being 101m high. It is extinct. Like The Mount, it’s covered with sugarcane fields.

While going to Nicoliere reservoir, on your left you will see Mt William, a dead volcano. A forest is found next to the crater, where there are lots of exotic Psidium cattleianum. It is 306m high.

Further from Mount Piton, you can see Mon Loisir hill. The elevation is low and covered with sugarcane.

From Mont Bar le duc, you can easily see Alma hill. Rich with trees, this dead volcano has always been a scenic spot.

Mont Calebasses is an isolated peak, being 632m in height. It can be seen from the Terre Rouge-Verdun Highway. It was a volcano.

Located in Nouvelle decouverte, it is extinct. The crater is shallow.

This volcano is low. It is located near Belle Rive.

Near Verdun hill, this volcano, like Trou Kanaka, is 570m high. It is extinct.

Next to Mare aux Vacoas reservoir, Trou de Mme Bouchet is extinct.

Being the highest volcano in Mauritius, it is 686m high. Like Trou de Mme Bouchet, it is next to Mare aux Vacoas reservoir.

Like Trou Kanaka, it is in the Domaine des 7 vallees nature park.