Set in the San Juan Islands and the rugged Cascade Mountains of the Pacific Northwest. More than fifty elite and amateur teams race non-stop for up to seven days on end: kayaking, running, trekking and mountain biking through unforgiving terrain. Struggling to overcome physical and mental challenges becomes secondary as the teams deal with devastating tragedy as the race unfolds. Elite racers such as Ian Adamson, Rebecca Rusch, Nathan Fa'avae, Danelle Ballangee, Mike Kloser, Robin Benincasa and others try to lead their teams to the finish line and the $250,000 prize—Anonymous