He adds that more than just an endurance event, the race often becomes a breeding ground for lifelong friendships amongst runners.
"There is something magic inside the marathon because everybody is the same level," says Sepulchre. "You can be a good runner, a bad runner ... you can be the most rich, or the most poor guy, [here] you are in the same level and that's something unique."
Salter agrees. "The running is obviously amazing but a large part of it is also the camaraderie you have with your tent mates." Salter even met her partner at the race. "You share a tent with the same people for a week and it's really nice and you all help each other through."