The Lena River Basin is located in eastern Siberia, Russia. It covers an area of approximately 2.5 million square kilometers, making it one of the largest river basins in the world. The basin is primarily drained by the Lena River, which flows northward into the Arctic Ocean. This region is characterized by diverse ecosystems, including taiga forests and tundra. The Lena River itself is about 4,400 kilometers long, ranking as the longest river in Russia. The basin experiences a subarctic climate, with cold winters and short summers. Major cities in the basin include Yakutsk, which is one of the coldest cities on Earth.