One of the most popular events of Seafair is the Chevrolet Cup, which is an American Boat Racing Association unlimited hydroplane racing circuit stop at Stan Sayres Pits on Lake Washington in the Mount Baker neighborhood. The Chevrolet Cup races, which occur at the end of July or the beginning of August, attract tens of thousands of spectators, both those standing on the public shores of the lake, and those in boats anchored just outside the course in the lake itself. The same weekend, in a tradition re-started in 1972, the Blue Angels are brought to Seattle to perform their aerial stunts. (en.wikipedia.org/wiki/Seafair)