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Thousands of people ran, walked and partied on the city streets of San Francisco as they celebrated the 100th annual Bay to Breakers race May 15.

The 12K race hosted two types of crowds: the serious runners and those there for the famed costume aspect of the event.

Headlining the more conventional portion of the footrace was Moroccan Ridouane Harroufi, who finished first in the men’s group, and Kenyan Lineth Chepkurui, who finished first among the women.

But for many, like 28-year-old Jennie Waskey, Bay to Breakers is part of San Francisco tradition of fun–not competitive sports. She said she has consistently attended the race since the second grade.

“It started up as a family thing,” said Waskey. “Then it was about hanging out with friends.”

The more relaxed participants were focused solely on having a good time at the historic event.

Locals who played home to the event warmly embraced the crowd by providing music, and many offered drinks. A woman near Hayes Street yelled “Get your Jell-O shots!” as people passed by.

Although law enforcement and the Zazzle Bay to Breakers website said that alcohol would not be allowed, many found ways to drink, and many people were visibly intoxicated halfway through the race.

Elsie Williams, a San Francisco resident and 20-year Bay to Breakers participant, said that the race event has become more and more about partying.

“It’s gotten wilder over the years,” said Williams. “There’s more naked people. But it’s always fun.”

Police officers were present along every intersection of the route and many participants were asked to dispose of their alcoholic beverages.