The Lena River is one of the longest rivers in the world, stretching approximately 4,400 kilometers (2,736 miles) in eastern Siberia, Russia. It flows northward into the Laptev Sea, part of the Arctic Ocean, and is known for its vast drainage basin, which covers about 2.5 million square kilometers (965,000 square miles). The river is significant for its rich biodiversity and serves as a vital waterway for transportation and fishing. The Lena River also plays a crucial role in the local economy and culture, supporting communities along its banks and providing access to remote areas.