The Cohasset Swim Off will take place during the popular Cohasset Triathlon. The Swim Off athletes will compete on a 1 mile - 2 loop course - at Sandy Beach in Cohasset. The Swim Off wave will be the last wave of the triathlon. All Swim Off athletes are encourage to stick around, enjoy live music, free food, and cheer on over 1000 triathletes finish as they finish the race.