Heather Hart is a marathon runner and adventure racer.  Adventure Racing is a multi-sport feat that could include trekking, paddling a kayak or canoe, rock climbing and even horseback riding.  The course isn’t marked and participants cannot use GPS.  There is a time limit and teams have to hit as many checkpoints as they can in the time provided.  The challenge of Adventure Racing is facing the unknown.  You know where to start and what equipment you need but you don’t see a map of the course until the night before or the morning of…