The 1881 Greeley, Salt Lake and Pacific Railroad (GSL&P) - Stout Branch represents northern Colorado railroad operations, specifically the early efforts to connect the area with the transcontinental railroad by building a route through Poudre Canyon and west to Salt Lake City, and later use of the railroad to transport raw materials. The branch railroad played a significant role in the commercial and industrial development of northeastern Colorado. The rail line transported sandstone and limestone from quarries west of Fort Collins to building sites and sugar factories in La