Does anyone know about the sport of Rogaining?

Yep,

Rogaining is the sport of long distance cross-country navigation in which teams of two to five members visit as many checkpoints as possible in twenty-four hours. Teams travel entirely on foot, navigating by map and compass between checkpoints in terrain that varies from open farmland to hilly forest. A central base camp provides hot meals throughout the event and teams may return at any time to eat, rest or sleep. Teams travel at their own pace and anyone from children to grandparents can experience the personal satisfaction that comes from cross-country navigation at their own level of competition and comfort. One feature of rogaining is the opportunity for night navigation and the extra challenges that this involves. Although rogaines are defined as being twelve hours or longer, the classic rogaine is the twenty-four hour event.

The sport is active in Australasia and North America.

I thought it was a hair growing contest!

no