Childhood dreams often drive the most unusual and monumental achievements. Ben Masters’ dream was to ride horseback across his native United States, a 3,000-mile adventure through the American West from Mexico to Canada. But it wouldn’t be on just on any horse. Ben and his friends Thomas Glover, Ben Thamer and Jonny Fitzsimons wanted to do the trip on adopted wild mustangs that they had broken in themselves. Riding narrow desert trails, through the Grand Canyon, and traversing the wide-open plains, the dream became an extraordinary journey through America’s vanishing wilderness.