McCloud River Railroad No. 19, also known as Yreka Western No. 19, or Oregon, Pacific and Eastern No. 19, is a preserved 2-8-2 "Mikado" type steam locomotive in the United States that worked on the Caddo and Choctaw Railroad, United States Smelting, Refining and Mining Company McCloud River Railroad, Yreka Western Railroad, and the Oregon, Pacific, and Eastern Railway. It was purchased new from the Baldwin Locomotive Works (BLW) in 1915. Shortly after retirement, the engine operated on the Yreka Western before being moved up to Cottage Grove, Oregon to run on the OP&E. In the late 1980s, #19 was sent back down to Yreka, California to run on the YW. In April of 1994, the engine returned to McCloud, California to run a series of excursions on the McCloud, Railway. It has since been used in the films Emperor of the North Pole, Bound for Glory, and Stand By Me. As of 2022, No. 19 is being restored at the Age of Steam Roundhouse in Sugarcreek, Ohio.

The McCloud Railway was a class III railroad operated around Mount Shasta, California. It began operations on July 1, 1992, when it took over operations from the McCloud River Railroad. The MCR was incorporated on April 21, 1992.