Tuolba
The Tuolba rises on the northwestern edge of the Aldan uplands and flows toward the Lena, joining it from the right. At its mouth the river divides into several channels. Forested hills and valleys surround its course, and oxbow lakes occur in the river valleys of the surrounding country. The Tuolba is one of the waterways that carry the drainage of the southern uplands into the great Lena basin.