Folsom Street Fair or Oakland Raiders game? A photo quiz

Folsom Street Fair or Oakland Raiders game? Folsom Street Fair or Oakland Raiders game? Photo: Carolyne Zinko/San Francisco Chronicle Photo: Carolyne Zinko/San Francisco Chronicle Image 1 of / 30 Caption Close Folsom Street Fair or Oakland Raiders game? A photo quiz 1 / 30 Back to Gallery

In celebration of this Sunday's Folsom Street Fair, we've put together a potentially challenging gallery: some of these photos were snapped at Folsom Street Fairs of years past while others were taken at Oakland Raiders games. Can you tell which is which?

While the Folsom Street Fair is famous for boundary-breaking fetish wear, Raiders die-hards are known to celebrate game day by dressing the part. If we zoom in close enough and omit some obvious background clues, we just might stump you.

Anyone who dresses up for either of these two local activities is awesome for doing so. To the folks featured in this gallery, thank you for making the Bay Area waaaaay more fun.

Folsom Street Fair: 11 a.m.-6 p.m. Sunday, Sept. 25. Free. Folsom Street from Eighth to 13th streets. www.folsomstreetevents.org/folsomstreetfair