The Grand Ronde River is a tributary of the Umatilla River located in northeastern Oregon. It flows through the scenic Blue Mountains and is known for its clear waters and diverse wildlife. The river is approximately 50 miles long and is popular for recreational activities such as fishing, kayaking, and hiking along its banks. The river's watershed is part of the larger Columbia River Basin, which supports various ecosystems. The Grand Ronde River is also significant for local communities, providing water resources and contributing to the area's natural beauty. Its surroundings are home to numerous plant and animal species, making it an important ecological area.