Start of an Ironman! This co ed mass start is what makes the Ironman 2.4 mile swim unique! est. +2500 people! and 73% of them male.. basically you have to tell yourself "I got up early for masters swim, I went to bed early, to get up early to go swim, I swam in lakes!.. I belong here! that is what I really think. "I belong here, and as if in a school of fish.. swim with the pack, getting hit in the face, kicked in the chin and swam over! all the while thinking "I must get to my bike!"