The Gunnison National Forest is a U.S. National Forest covering 1,672,136 acres (2,612.71 sq mi, or 6,766.89 km²) in Mesa, Gunnison, Hinsdale and Saguache Counties in Western part of the U.S. state of Colorado. It borders the White River National Forest to the north, the Grand Mesa and Uncompahgre National Forests to the west, the San Isabel National Forest to the east and the Rio Grande National Forest to south. It lies in parts of five counties. In descending order of land area within the forest they are Gunnison, Saguache, Hinsdale, Delta, and Montrose counties.