Montrose is a home rule municipality that is the county seat and the most populous municipality of Montrose County, Colorado, United States. The city population was 20,291 at the 2020 census, within a total area of 18.5 square miles. The main road that leads in and out of Montrose is U.S. Highway 50. The town is located in western Colorado, in the Uncompahgre Valley, and is an economic, labor, and transportation waypoint for the surrounding recreation industry. In 2022, Montrose was ranked in the top-25 of the nation's most dynamic micropolitan statistical areas by think tank Heartland Forward largely due to its outdoor recreation access. History Montrose was incorporated on May 2, 1882, and named after Sir Walter Scott's novel A Legend of Montrose by Oliver D. "Pappy" Loutzenhizer and Joseph Selig. The Denver & Rio Grande railroad was built west toward Grand Junction and reached Montrose later in 1882, and the town became an important regional shipping center. A branch railroad line served the mineral-rich San Juan Mountains to the south. In 1909, the U.S. government completed construction of the Gunnison Tunnel, located east of Montrose. It provided irrigation water from the Gunnison River in the Black Canyon to the Uncompahgre Valley, helping turn Montrose into an agricultural hub. The Uncompahgre Project is one of the oldest of those in the area by the U.S. Bureau of Reclamation. Early in the area's history, prehistoric people lived in the vicinity who created rock art at the Shavano Valley Rock Art Site from 1000 BC or earlier; their descendants continued this practice until about AD 1881. These petroglyphs recorded cultural events and were a means of artistic expression. The site is listed on the Colorado State Register of Historic Properties and the National Register of Historic Places. Montrose is the birthplace of American screenwriter and novelist Dalton Trumbo, who scripted films including Roman Holiday, Exodus, Spartacus and Thirty Seconds Over Tokyo. Geography According to the United States Census Bureau, the city has a total area of ; all of it is land. Montrose is at the south end of the Uncompahgre valley and is built on the Uncompahgre River, which runs to the north, where 60 miles further its waters will join the Colorado River. It is surrounded by, to the north, the widening Uncompahgre Valley and the Grand Mesa, to the east, the Black Canyon of the Gunnison National Park,