In the days of regulated railroads, each company needed their own separate route over the mountains. With mergers and acquisitions only the big railroads survived, and trimmed to the most efficient routes over the mountains. When Union Pacific gained this route, they found that the 3% grade over the mountains took a lot of helper locomotives and a lot of fuel. As a result, this line has been ‘mothballed’ and is no longer used. But not before taking a spectacular steam excursion over the pass. So… just like the market today, the Gold Train finds itself deep in a valley, trying to climb a mountain.
http://www.railpictures.net/viewphoto.php?id=495388