Washington is home to numerous rivers that play a vital role in the state's ecology and economy. The Columbia River is the largest, flowing through the state and forming part of the border with Oregon. Other significant rivers include the Snake River, which is a major tributary of the Columbia, and the Yakima River, known for its agricultural importance. These rivers provide essential habitats for wildlife and are popular for recreational activities such as fishing, kayaking, and rafting. The Skagit River is famous for its salmon runs, while the Snoqualmie River is known for its stunning waterfalls and scenic views.