Front Range Urban Corridor

Front Range Urban Corridor
Megaregion of the United States
Denver, the largest city in the metropolitan area
Interactive map of the Front Range Urban Corridor of Colorado and Wyoming   Cheyenne, WY MSA   Fort Collins, CO MSA   Greeley, CO MSA   Boulder, CO MSA   City and County of Denver   Denver metropolitan area   Colorado Springs, CO MSA   Cañon City, CO MSA   Pueblo, CO MSA
Coordinates: 39.7392°N 104.9850°W / 39.7392; -104.9850 (Front Range Urban Corridor)
Country	United States
States	Wyoming Colorado
Largest city	- Denver
Other principal cities	- Colorado Springs  - Aurora  - Fort Collins  - Lakewood  - Thornton  - Arvada  - Westminster  - Pueblo  - Greeley  - Centennial  - Boulder  - Longmont  - Cheyenne
Area
• Total	25,153 sq mi (65,150 km2)
Population  (2020 census)
• Total	5,055,344
GDP
• Total	$476.612 billion (2023)

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The Front Range Urban Corridor is an oblong region of urban population located along the eastern face of the Southern Rocky Mountains, encompassing 18 counties in the US states of Colorado and Wyoming. The corridor derives its name from the Front Range, the mountain range that defines the western boundary of the corridor which serves as a gateway to the Rocky Mountains. The region comprises the northern portion of the Southern Rocky Mountain Front geographic area, which in turn comprises the southern portion of the Rocky Mountain Front geographic area of Canada and the United States. The Front Range Urban Corridor had a population of 5,055,344 at the 2020 census, an increase of +16.65% since the 2010 census, and a population of approximately 5.3 million as of 2025 census estimates.

The corridor contains some of the West's largest cities, such as Denver and Colorado Springs. It also contains smaller but significant urban areas such as Pueblo, Fort Collins and Cheyenne. Its main transportation corridor is Interstate 25. There have been many proposals over the years for a single passenger rail connecting most of the major urban areas within the corridor, although none have come to fruition as of mid-2026. Plans are actively under development and moving forward for the Colorado Connector (CoCo), also known as the Front Range Passenger Rail. The first phase of service connecting Denver and Fort Collins could commence as soon as 2029, with full corridor service (sans Cheyenne, Wyoming) occurring just a few years after that.