Dos Rios is an American Viticultural Area (AVA) located in northern Mendocino County, California.
Dos Rios viticultural area was established on October 14, 2005 by the Alcohol and Tobacco Tax and Trade Bureau (TTB), Treasury after reviewing a petition submitted by Ralph Jens Carter of Sonoma, California, proposing the establishment of a viticultural area named "Dos Rios" which is Spanish for "two rivers."
The Dos Rios viticultural area encompasses portions of the canyons containing the two rivers.
Currently, six acres (2 ha) of commercial vineyards are cultivated within the AVA, with the potential for additional plantings.
The marine breezes blowing through the canyons of the viticultural area moderate temperatures, making the Dos Rios region cooler in the summer and warmer in the winter than regions to the east that have a more continental climate.