The Walla Walla River is a tributary of the Columbia River located in the southeastern part of the state of Washington. It flows approximately 60 miles through the Walla Walla Valley, an area known for its agriculture and vineyards. The river's watershed supports various ecosystems and provides water for irrigation. The river begins in the Blue Mountains and travels northwest, passing through the city of Walla Walla. It is an important resource for local communities, offering recreational opportunities such as fishing, kayaking, and hiking along its banks. The river also plays a role in the region's wildlife habitat.