Tunguska

The upper Lower Tunguska crosses the Central Siberian Plateau in a broad, winding valley. Its waters run north before turning west towards the Yenisei, gathering tributaries from forested uplands along the way. The river is frozen through much of the year, and the spring flood greatly raises its level. In the early seventeenth century travellers crossed between the Tunguska and Lena basins by portage, linking two of Siberia’s great waterways.