Tolmachev Dol () (Tolmachev Plateau) is a volcanic highland located in the southern part of Kamchatka Peninsula, Russia, northeast of Opala volcano. The cones and lava fields cover a broad area around within the intermountain Tolmachev depression of area about 650 sq.km.
Tolmachev Dol is a large volcanic field, consisting of cinder cones and lava flows (GVP). It has principally erupted andesite and dacite. The Tolmachev Depression resulted from sagging a major lava province.
The stratovolcano is nearby.
Activity in the volcanic field commenced during the Pleistocene (GVP). The Chasha crater was the site of a large eruption about 4,609 ñ 33 years before present, which ejected about of ash over an area of . This ash was formerly attributed to the Opala volcano. 300 CE, the last eruption took place (GVP).