On a warm and sunny day in Happy Valley, Union Pacific's LUL57 local ascends York Hill between a private irrigation reservoir and the Summit Ridge housing development in south Santaquin, Utah. In the distance, the Oquirrh Mountains offer a wintry backdrop on this late winter day in March 2010. This train of five box cars (picked up at Longview Fiber in Spanish Fork) will be set out at Lynndyl yard.