Dead Baby Bikes Downhill, also known as Dead Baby Bike Race or Dead Baby Downhill or RaceDay, is an annual Seattle-based bicycle race and street party that occurs on the first Saturday of August. ^[1] The bicycle race often has no defined route, just an origin and an ending point, and has historically not been permitted, even though the accompanying street party has been permitted.^[1]

Over the years, the event has grown from attracting hundreds to now thousands of people to various Seattle neighborhoods, lately in Georgetown mostly (but not always, nor originally, please).^[1][2][3]

The street party at times features carnival rides made of bicycle parts, as well as bicycle jousting.^[4]

The event was featured in a 2005 episode of the television show Grey's Anatomy.^[1]

The event was given their best try in 1997 by the members of Dead Baby Bikes (perhaps due to the most enthusiastic Critical Mass in Seattle history? Jun271997 [they rode on the viaduct!]), a Seattle bicycle club (named for a doll which had been nailed to the wall of the roll-up door of the bike repair shop in which the club was meeting) in existence many years before inklings of a race; founder Dave Ranstrom has admitted that if he had known the event would draw media attention, he would have chosen a different name.^[5]

• Official site