The Lake Mendota Boathouse was a recreational building and storage facility owned by the University of Wisconsin located on Lake Mendota in Madison, Wisconsin. It was designed and built by architect Frank Lloyd Wright after he was awarded the commission of the building in 1893 based on drawings he submitted to a competition held by the Madison Park and Pleasure Drive Association. The primary functions of the building were to store recreational equipment and to serve as a viewing deck for "boating events and races that took place on the lake."