SAN FRANCISCO, Loud sirens, flashing lights and countless rainbow flags and banners accompanied uniformed police officers, cheerleaders and politicians who marched in San Francisco’s gay pride parade Sunday, the 42nd year the city has celebrated the lesbian, gay and transgender community.

More than 200 floats made their way down Market Street, the city’s main thoroughfare. Brightly colored outfits made from balloons, while many other participants and parade watchers wore hardly anything.

Organizers said San Francisco’s weekend events are the largest LGBT gathering in the nation, but thousands were also celebrating in Chicago and New York City, where parade-goers are toasting the anniversary of the state’s same-sex marriage law.

San Francisco’s parade came a day after a smaller march in the city’s Dolores Park and the so-called “Pink Saturday” street party.