The Grand Valley is an extended populated valley, approximately 30 miles (48 km) long and 5 miles (8 km) wide, located along the Colorado River in Mesa County, Colorado and Grand County, Utah in the United States. The valley contains the city of Grand Junction, as well as other smaller communities such as Fruita, and Palisade. The valley is noted as a major fruit growing region, with a large number of orchards. It takes its name from the "Grand River", the historical name of the Colorado River upstream from its confluence with the Green River that was used by locals in the late 19th and early 20th century. The valley is the most densely populated area on the Colorado Western Slope, with Grand Junction serving as somewhat of an unofficial capital of the region, as a counterpoint to Denver on the eastern slope of the Rocky Mountains in the Colorado Front Range. Interstate 70 and U.S. Highway 6 run through the valley from west-to-east.