 U.S. Highway 40 | ||||
|---|---|---|---|---|
 US 40 highlighted in red | ||||
| Route information | ||||
| Maintained by CDOT | ||||
| Length | 496.442 mi[1] (798.946 km) | |||
| Existed | 1926–present | |||
| Major junctions | ||||
| West end |  US 40 at the Utah state line | |||
| East end | US-40 east of Arapahoe at the Kansas state line | |||
| Location | ||||
| Country | United States | |||
| State | Colorado | |||
| Counties | Moffat, Routt, Jackson, Grand, Clear Creek, Jefferson, Denver, Adams, Arapahoe, Elbert, Lincoln, Cheyenne | |||
| Highway system | ||||
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U.S. Route 40 (US 40) is a part of the U.S. Highway System that travels from Silver Summit, Utah, to Atlantic City, New Jersey. In the U.S. state of Colorado, US 40 is a major east–west route. It crosses the Rocky Mountains, passing over the Continental Divide at Berthoud Pass before descending to the Front Range. It then traverses through the Denver Metro Area, then exits by following Interstate 70 (I-70) and US 287. It is concurrent with US 287 for about 145 miles to Kit Carson. US 40 exits into Kansas east of Arapahoe in Cheyenne. At a length of almost 500 miles, US 40 is the longest numbered route in the state.
- ^ Colorado Department of Transportation, Highway Data Archived 2007-10-08 at the Wayback Machine, accessed July 2007