Monte Rio is a census-designated place (CDP) in Sonoma County, California along the Russian River near thePacific Ocean.The population was 1,152 at the 2010 census.
Starting in the 1870s, Monte Rio was a stop on the North Pacific Coast Railroad connecting Cazadero to the Sausalito, California ferry. Redwood lumber from local sawmills was shipped to build San Francisco. After the sawmills left, the area became known as Vacation Wonderland with trains transporting San Franciscans to summer cabins and even a seven story hotel downtown. Portions of the 1942 Academy Award winning film "White Christmas" were filmed at the Village Inn Resort in Monte Rio.Although the trains have left and the area now is mainly inhabited by full year residents, Monte Rio still welcomes vacationers with its beautiful scenery and unbeatable temperate micro-climate.