 Tomsk Oblast, part of the wider region of Siberia, is almost entirely taiga.Approximately 85% of the oblast is forested, with Siberian pines, Scots pines, spruce, fir, and larch trees being some of the common trees in the area.Major rivers which pass through the oblast include the Ob, Tom, Chulym, Chaya, Ket, Parabel, Vasyugan, and the Tym.