Boston Clam Chowder versus Manhattan Clam Chowder. You be the judge this coming Saturday and Sunday at the world’s largest and longest running competition on the Santa Cruz Boardwalk. Admission is free, but you can be a judge by paying $10 to spoon up to 6 different chowders courtesy of ┬áboth professional and amateur chefs. Prizes include cash and a round trip United Airlines ticket.