Mount Karisimbi a stratovolcano in the Virunga Mountains on the border between Rwanda and the Democratic Republic of Congo.

Karisimbi is flanked by Mikeno to the north, Bisoke to the east and Nyiragongo to the west, on the other side of the Rift Valley.

Snow can mostly be found during the dry season in June, July and August on the top of the volcano.

Between Karisimbi and Bisoke is the Karisoke Research Center, which was founded by Dian Fossey in order to observe the mountain gorillas living in this area.

[2][3] In May 2010, a series of non-volcanic mudflows triggered by rain occurred along the volcano's western flank.