Train Mountain Railroad near Chiloquin, Oregon, is a rideable miniature railway and museum spread across 2,205 acres and widely regarded as the world’s largest miniature hobbyist railroad. Recognized by Guinness World Records in 2004 for its length, it has since expanded further and supports both 1.5-inch-scale and larger locomotives, including heavy steam engines. Founded from Quentin Breen’s vision, it became a major destination for live steam enthusiasts from the United States and abroad, hosting a triennial international meet since 2000. The site also offers train tours, includes garden and full-size railroad museums, and preserves notable full-size railroad equipment.