Mitch Seavey, 57, becomes oldest musher to win nearly 1,000-mile Iditarod Trail Sled Dog Race across Alaska By AP Published Mar. 14, 2017 7:49 p.m. ET ANCHORAGE, Alaska (AP) Mitch Seavey, 57, becomes oldest musher to win nearly 1,000-mile Iditarod Trail Sled Dog Race across Alaska.