Answer
The Sammamish River is the river that flows through Redmond. It is a tributary of the Snoqualmie River, which in turn flows into Puget Sound. The Sammamish River is about 20 miles long and has a drainage basin of about 170 square miles. The river is used for recreation, including fishing, boating, and swimming. It is also a source of drinking water for the city of Redmond.