Designed for elementary school students, this unit on the coming of the railroad in Wyoming provides concepts, activities, resource lists, and maps. Concepts stress the coming of the railroad in 1867-69, routes which were considered, towns owing their origin to the railroad, the railroad ownership of southern Wyoming, and the relationship between the Union Pacific and Wyoming. Students engage in a field trip to the largest steam engine in history, research presently nonexistent towns, talk with representatives of various railroad jobs, make maps of railroad routes, take a train trip to Laramie, and make a tape collection of oral interviews with old-timers who worked on the railroad. Reproducible instructions for making a locomotive out of cardboard, and photographs of a train schedule and an 1877 Union Pacific advertisement are provided. The bibliography lists books, articles, films, and maps. (KC)