Every year in the heart of winter, runners, bikers, and skiers challenge themselves to cross 135 miles of terrain in the remote woods of northern Minnesota. This title introduces readers to one of the coldest ultramarathons on the planet, a race that begins in the “Icebox of the Nation” and only gets tougher from there. The title features informative sidebars, exciting photos, a map, a glossary, and an index. SportsZone is an imprint of Abdo Publishing, a division of ABDO.