There are plenty of non-traditional ways to celebrate Valentines Day, but stripping down and jogging around the U.S. Capitol for charity has become a tradition unto itself. As has been done for the past six years running, hundreds of people participated in a (very) friendly 1-mile run to raise money for the Children’s Tumor Foundation. The event, which has since spread to 36 U.S. cities, was actually founded in D.C. in 2010. Photographer Josh Marks was out there to capture all the theatrics.