Vashka
The Vashka rises among the marshes of the Mezen–Northern Dvina watershed and flows through coniferous forest to the Mezen. It is the Mezen's largest tributary, carrying waters from a broad northern basin toward the White Sea. The river freezes from late autumn into spring and is fed by snow and rain. A charter of 1471 records its name as Vazhka; older texts also call it Udora, a name associated with the Komi country along its course.