As the popularity of these events has spread, races now attract serious runners who, in many cases, are going nude for the first time. The races have gotten so official they’re advertised in running magazines. The 5K is a great way to try social nudity while doing something enjoyable. And guys, no – it doesn’t hurt to run naked and ladies, if you need to wear a bra to run – do so.

Participation varies depending on location and weather; only half a dozen showed up in Cape Town in 2008 but 10,000 got on their bikes in Portland in 2015. A typical WNBR event is in the hundreds. The next rides are scheduled for July 2020 (northern hemisphere) and March 2020 (southern hemisphere.) 2. Bay to Breakers The Running of the Nudes (well actually it’s more a stroll) is a march to protest cruelty to animals in general and bullfighting, specifically. The marchers are naked save for many wearing plastic horns or a red scarf. So if you feel strongly about such causes, lose your clothes, put on your plastic horns and be sure to show up on the right day. 7. Nude 5k races We’re all quite familiar with the annual Running of the Bulls in Pamplona, Spain, but there’s a more sedate and far safer event that takes place on the same route two days before. Since its inception in 2003, World Naked Bike Ride's focus has been on reducing our dependence on cars while emphasizing the vulnerability of cyclists and promoting body acceptance. But what started as a protest, feels more like a carnival nowadays. Increasing public and media interest has seen the WNBR expand to 70 cities in 20 countries around the globe – from Australia to the US, Brazil to the UK – with more cities hosting their own rides each year.The annual Bay to Breakers race takes place on the third Sunday in May (May 15, 2020). Although this is a sponsored event with world-class athletes competing, it’s also something of a large fete with many of the 70,000 or so runners, joggers and walkers sporting costumes or participating nude.