Bay to Breakers in San Francisco is much more than just an annual race. The event has become notorious for its party-like atmosphere, with thousands of people running the 7.5 mile route in wild costumes, or wearing absolutely nothing at all. With its 110+ year history in the city, how did Bay to Breakers go from an ordinary race to a kind of festival-on-foot? Reporter Azul Dahlstrom-Eckman chases down the answer and explores the event's highs and lows on this week's episode.

Additional Reading:

• Bay to Breakers Is Part Race, Part Parade and Classic San Francisco
• Read a transcript of this episode
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This story was reported by Azul Dahlstrom-Eckman. Bay Curious is made by Olivia Allen-Price, Amanda Font, Christopher Beale and Brendan Willard. Additional support from Pauline Bartolone, Cesar Saldana, Jen Chien, Katie Sprenger, Jasmine Garnett, Carly Severn, Jenny Pritchett and Holly Kernan.