Over the years, the race from the Bay to the ocean, via Hayes Valley and Golden Gate Park, has grown into one of the largest post-college parties in the nation — complete with keg-packed floats, CamelBaks filled with booze, screaming girls, and many, many hot young men in diapers, wigs, grass skirts and the like.

We at The Sword tend to avoid big messes of heterosexual debauchery, but we like drinking and shirtless boys enough that we dropped in to shoot some photos — à la our gallery of shirtless twinks from Love Parade last fall. Also along for the ride were some pervy nudist old guys and a couple of guys dressed as sperm. Enjoy.

Photos by The Sword and by helaine_photo, naters98, jonfranks, and The Larch on Flickr.