Fotomission and Tropicolor host the 13th annual South Beach photomarathon. Participants will be assigned six topics to photograph on South Beach over a period of five hours. A panel of judges will select the best photos from each topic, and the first, second and third-place winners will be awarded cash and other prizes, including large plexi mounted prints of their winning images. 9:30 a.m. Miami Design Preservation League, 1001 Ocean Dr., Miami Beach. Details: http://www.fotomission.org/.