Bennington Lake is located in southeastern Washington minutes from historic downtown Walla Walla, Washington?s oldest city. Enjoy beautiful views of the northern Blue Mountains and the open space surrounding the lake. Bennington Lake, while small, offers plenty of fun, safe, and relaxing times. Tour local wineries and taste the world famous Walla Walla sweet onions (summers only). Take a short trip to the Whitman Mission National Historic Site and Interpretive Center just west of Walla Walla along Highway 12.