For a map or aerial photo, it is the lake in the center of this map on terraserver " class="external">http://terraserver.microsoft.com/image.aspx?t=2&s=16&x=44&y=411&z=10&w=1
Lake Sammamish State Park is situated at its south end. [1]
Sammamish River is a river that flows from Lake Sammamish to Lake Washington.
City of Sammamish