The Columbia River Basin is a large watershed in the Pacific Northwest of North America, primarily located in the United States and Canada. It covers an area of about 258,000 square miles and includes parts of several states, including Washington, Oregon, Idaho, and British Columbia. The basin is named after the Columbia River, which flows through it and is one of the largest rivers in North America. The basin is known for its diverse ecosystems, which range from forests to deserts. It supports various wildlife and is vital for agriculture, fishing, and hydroelectric power generation. The Columbia River also plays a significant role in the region's economy and culture, providing resources and recreational opportunities for local communities.