If you’ve always wanted to do one of those mud races but weren’t big on ruining a perfectly good set of worn-out gym clothes, this is the race for you. Hosted by the Sun Ray Hills clothing-optional camp, this race takes you through 3.1 miles of obstacles -- like a foam pit, mud crawl, balance beam, rope ladder, rope swing, and a giant slip and slide -- all completely naked. Though it sounds both messy and potentially damaging to anyone considering reproduction, the race is actually held to draw attention to breast and testicular cancer, and to encourage people to get checked out.
Los Angeles, CA
Los Angeles isn’t exactly the city you’d put at the top of your list for promoting “body positivity,” but this annual ride through downtown and Echo Park attempts to do just that; Angelinos flaunt it all on this police-escorted ride, although naturally since it's LA, riders are joined by dozens of skaters and rollerbladers. Also, since it’s LA, two fistfights have broken out in recent years -- one in 2013 when a rider was randomly punched and another when angry drivers didn’t appreciate having their commute lengthened by a bunch of nudists.