A quartet of runners costumed as children's book character Waldo search for themselves while passing through Golden Gate Park, during the 105th running of the Bay to Breakers 12k, Sunday, May 15, 2016 in San Francisco. The 7.42-mile race from San Francisco Bay to the Pacific Ocean, which attracts a field of tens of thousands of runners, from elite runners to weekend warriors, some clad in costume and some in nothing at all. (Photo by D. Ross Cameron)