A Big Boy running in the 21st Century. UP 4014 & 844 lead the P-ENRS1-13 through the mountains between Green River, and Rock Spring, Wyoming during the Great Race from Ogden.

A Big Boy running in the 21st Century. UP 4014 leads the P-ENRS1-13 as they depart Evanston Yard, bound for Rock Spring, WY, during the Great Race from Ogden.

UP's freshly restored Big Boy No. 4014 doing exactly what it was designed to do on its home rails. The Great Race from Ogden climbs a short grade before beginning its descent into Green River, WY.