[2] The Eastern Range stretches roughly from NNE to SSW for 600 kilometres (370 mi) along the eastern part of the peninsula between the southern Karaginsky Gulf at the northern end and Avacha Bay at the southern.

[3] The main part of the Eastern Range is part of the East Kamchatka Anticline dating back to the Cenozoic orogeny, composed of Upper Cretaceous sediments and volcanic rocks, such as basalt and tuff.

[2] The system of the Eastern Range comprises a number of subranges, including the following: Some geographic works include the Kluchevskaya group of volcanoes, highest point 4,750 metres (15,580 ft), as well as the Gamchen Range, highest point 2,576 metres (8,451 ft), as part of the Eastern Range.

[5] The Eastern Kamchatka zone of recent and ongoing volcanic eruptions is around the area where the Valagin and the Tumrok ranges meet, with a number of active volcanoes, such as the Kizimen, Shiveluch, and Karymskaya Sopka.

[2] The lower parts of the slopes of the Eastern Range are covered in birch and fir forests and dwarf cedar shrub, as well as rhododendron.