A total of 100,000 acres were listed for sale in Colorado's Montrose County recently, representing a total value of almost $229 million in Montrose County land and rural real estate for sale. Montrose County ranks 14th out of 64 counties in the Mile High State for the total acreage of land currently advertised for sale. Montrose featured the most land for sale. Montrose County is Colorado's 16th biggest county (2,242 square miles). It's located in the Southwest Colorado region of Colorado.