The World Naked Bike Ride is an annual, worldwide bike ride that aims to promote cycling and fight against oil dependence in transportation. The event also shares lots of joy and is free for all. There are a lot of cyclists with their own reasons to participate, which can be found written on their bare backs.
The actual location is kept secret until a few weeks before the event. The route is also kept under wraps to discourage a huge crowd of onlookers. Although, there is a tendency to move a little further from the center of Portland, as the crowd becomes bigger and bigger every year with about 10,000 participants annually.