In 1899-1900 a branch railroad line called the Rio Grande, Pagosa, and Northern Railroad was built between Gato and Pagosa Springs, Colorado. It was a logging railroad, bringing timber and lumber from the Pagosa Springs area to the main line in Gato. In 1899, as the population grew to 200 people, a post office was built in Gato, and the name was changed to Pagosa Junction.[2][3]
By 1930, Pagosa Junction's population had grown to 447. However, the branch to Pagosa Springs closed in the 1930s, and the town's population began to decline. Today, completely abandoned, some of the town's buildings remain, including St. John the Baptist Mission Church, located on a hill above the town.[2][3] It was built on the hill in 1927, replacing two earlier churches — the first built in 1911 — that were destroyed by floods on the San Juan River that flows through the town.[4]