More than 100 stand-up and prone paddleboarders, in addition to competitors in other types of watercraft including outrigger canoes, surf-skis, kayaks and rowboats, will embark on a over-20-mile journey designed to test competitors mentally and physically similar to someone battling cancer or an 8-mile race for less seasoned paddlers. There are also two options for people who want to participate in a non-competitive paddle.