Udina, Volcanic massif in Kamchatka Peninsula, Russia

Udina is a volcanic massif in the central Kamchatka Peninsula, Russia, formed by two conical stratovolcanoes. The western Bolshaya Udina rises to 2,920 m and has a 400 m summit crater filled by a glacier; the eastern Malaya Udina reaches 1,945 m and is dotted with small lava domes.

Udina was long regarded as a dormant system until seismic signals detected in recent years pointed to activity beneath the surface. This finding led scientists to reassess the status of the entire complex.

The name Udina covers two volcanoes: Bolshaya Udina, the western and larger one at 2,920 m, and Malaya Udina, the smaller basaltic cone at the eastern end of the massif. Both belong to the Klyuchevskaya group of volcanoes, the southernmost pair in that group, in the central part of the Kamchatka Peninsula.

The area is very remote and reaching it requires hiking experience and thorough preparation before setting out. Consulting a local tour operator familiar with the region is a practical first step for anyone planning a visit.

The two cones are the southernmost in the Klyuchevskaya group of volcanoes. Malaya Udina, the smaller eastern cone at 1,945 m, is basaltic and carries small lava domes on its flanks; Bolshaya Udina, the western cone at about 2,920 m, is andesitic with a lava dome on its southwestern flank.