Indigirka River

River, Sakha republic (Yakutia), far eastern Russia. It is one of the major rivers of northeastern Siberia. The Indigirka rises in the Verkhoyansk Mountains and flows 1,072 miles (1,726 km) north through the Chersky Range into the broad Indigirka lowland, most of which is in tundra vegetation, to enter the East Siberian Sea through an extensive delta. Its two main tributaries are