Going to sea by rail An eastbound Union Pacific freight begins the long trek across Great Salt Lake at Lakeside, Utah, as the end of the train in the foreground is about to leave terra firma for the long 20-mile trip across the causeway. A wood trestle used to carry the line straight across in front of the train, but was later replaced with the fill that now zig-zags 1,500 feet to the north. Promontory Peninsula and the Wasatch Mountains dominate the background, with Ogden located between them.