All you need is a pair of sneakers! Twelve overweight people set off on the walk of a lifetime! It's an epic, life-changing journey that begins at the starting line for the Boston Marathon and ends in Washington, DC. The contestants and their two charismatic fitness trainers, Steve Pfiester and Lorrie Henry, will walk over 570 miles, passing through nine states, with the goal of shedding unwanted pounds and getting fit along the way in an attempt to permanently alter their lives. In addition, they all will compete for a prize pool of $1.2 million. Stressing team work, the more people who finish, the more money each person wins, on Fat March.