Seafair is the annual Lake Washington boating festival that includes Hydroplane races and an air show. I do not recommend attending this event by boat as there are so many Police jurisdictions that can stop and question you. Even things that one would think are minor infractions are criminal offenses when it comes to boating. Unlike a car a boat can be stopped by Police for no reason (also known as a Safety Check) and the penalties for Boating Under the Influence are now the same as driving a car (gross misdemeanor - max penalty $5000 and 365 days in jail).
Seafair was once a fun, safe boating festival but I can no longer recommend attending.
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