|U.S. Highways in Colorado|
|US Highways||U.S. Highway X (US X)|
|Number||Length (mi)||Length (km)||Southern or western terminus||Northern or eastern terminus||Formed||Removed||Notes|
|US 6||467.284||752.021||I-70/US 6/US 50 near Mack||US 6 near Holyoke||—||—|
|US 24||277.668||446.863||I-70 near Minturn||US 24 near Burlington||—||—|
|US 34||259.529||417.671||US 40 in Granby||US 34 near Wray||—||—|
|US 36||213.458||343.527||US 34 at Deer Ridge in Rocky Mountain National Park||US 36 near Idalia||—||—|
|US 38||—||—||—||—||—||—||Now US 34 from Greeley to Wiggins, I-70 Bus. from Fort Morgan to Sterling, and US 6 east of Sterling|
|US 40||496.385||798.854||US 40 west of Dinosaur||US 40 east of Arapahoe||—||—|
|US 40N||—||—||—||—||—||1936c.||Now US 24 east of Limon|
|US 40S||—||—||—||—||—||1936c.||Now US 24 west of Limon and US 40 east of Limon|
|US 50||467.583||752.502||I-70/US 6/US 50 near Grand Junction||US 50/US 400 near Holly||—||—|
|US 84||28||45||US 160 near Pagosa Springs||US 84 near Chromo||—||—|
|US 85||310||499||I-25/US 85/US 87 near Trinidad||US 85 near Eaton||—||—|
|US 87||305.040||490.914||I-25/US 85/US 87 near Trinidad||I-25/US 87||—||—||Concurrent with I-25 for whole route.|
|US 138||59.823||96.276||US 6 near Sterling||US 138 near Julesburg||—||—|
|US 160||497.223||800.203||US 160 near Teec Nos Pos, Arizona||US 160 near Walsh||1930c.||current||Original western terminus was Trinidad. Extended via US 85 and US 450 to near Dove Creek in 1934. Rerouted west of Cortez via US 164 in 1970 toward Four Corners Monument.|
|US 164||—||—||—||—||1966||1970||Now US 160 west of Cortez|
|US 285||263.947||424.782||US 285 near Antonito||I-25 in Denver||1936||current||Originally terminated on Alameda Ave. at US 85/US 87. In 1969, rerouted to terminate at US 40 (Colfax Ave.) in Aurora. Truncated at I-25 in Denver in 1979.|
|US 287||385.22||619.95||US 287/US 385 near Campo||US 287 near Virginia Dale||—||—|
|US 350||72.718||117.028||US 160 near Walsenburg||US 50 in La Junta||1927c.||current|
|US 385||263.734||424.439||US 287/US 385 near Campo||I-76 near Julesburg||—||—|
|US 400||14.814||23.841||US 50/US 385 in Granada||US 50/US 400 near Coolidge, Kansas||1996||current|
|US 450||—||—||—||—||1927c.||1939||Now US 491 north of Cortez and US 160 from Cortez to Walsenburg|
|US 491||69.602||112.014||US 491 north of Shiprock, New Mexico||US 491 north of Dove Creek||2003||current||Formerly US 666|
|US 550||103.066||165.869||US 550 near Durango||US 50 in Montrose||—||—|
|US 650||—||—||—||—||1927c.||1936||Now SH 291 through Salida and US 285 south of Buena Vista|
|US 666||—||—||—||—||1927c.||2003||Now US 491|
|US 789||—||—||New Mexico state line||Wyoming state line||—||—||Proposed, but never commissioned; would have followed (south to north): US 666, US 160, US 550, US 6/US 24, SH 13|
U.S. Route 400 is a 481.306-mile-long (774.587 km) mostly east–west U.S. Highway, commissioned in 1994. The highway's western terminus is in Granada, Colorado, at an intersection with US 385. The highway's eastern terminus is southwest of Joplin, Missouri, near Loma Linda, at an interchange with Interstate 44, with which it shares with US 166. It originally ended in Garden City, Kansas; in 1996 it was extended to its current western terminus.
U.S. Route 491 (US 491) is a north–south U.S. Highway serving the Four Corners region of the United States. One of the newest designations in the U.S. Highway System, it was created in 2003 as a renumbering of U.S. Route 666 (US 666). With the 666 designation, this road was nicknamed the "Devil's Highway" because of the significance of the number 666 to many Christian denominations, which is the Number of the Beast. This Satanic connotation, combined with a high fatality rate along the New Mexico portion, convinced some people the highway was cursed. The problem was compounded by persistent sign theft. These factors led to two efforts to renumber the highway, first by officials in Arizona, later in New Mexico. There have been safety improvement projects in recent years, and fatality rates have subsequently decreased.
Interstate 225 (I-225) is a 11.959 mile (19.246 km) connector spur route of Interstate 25 in Colorado. It is the only auxiliary route of Interstate 25, and one of two auxiliary Interstate highways in the state of Colorado. I-225 traverses Aurora and small portions of Denver and Greenwood Village. It runs north from Interstate 25 to Interstate 70. It intersects with state highway 83, state highway 30 and Interstate 70 Business/U.S. Highway 40/U.S. Highway 287, known locally as Colfax Avenue. Construction on the freeway began in 1964 at the I-70 interchange and continued progressively through many years proceeding south through Aurora until final completion in 1976 with the final link between Yosemite Street and I-25.
Vail Pass is a 10,666-foot-high (3,251 m) mountain pass in the Rocky Mountains of central Colorado. The pass was named for Charles Vail, a highway engineer and director of the Colorado State Highway Department from 1930 to 1945.
Interstate 270 (I-270) is a 7-mile-long (11 km) highway in the northeastern part of the Denver–Aurora Metropolitan Area in the U.S. state of Colorado. It overlaps U.S. Highway 36 (US 36) for its entire length. The western terminus of I-270 is at the interchange with I-25 and US 36. It heads eastward to an interchange with I-76, where the mileposts reset because of a previous freeway extension. The freeway heads southeast and comes to meet Vasquez Boulevard, where it enters Commerce City. The road crosses Quebec Street before ending at I-70.
U.S. Route 6 (US 6) is a part of the U.S. Highway System that travels from Bishop, California, to Provincetown, Massachusetts. In the U.S. state of Colorado, US 6 is an east–west highway stretching from Utah to Nebraska. Much of the route overlaps other highways in Colorado, and as a result, much of US 6 is unsigned.
State Highway 11 is a 1.35-mile-long (2.17 km) long north–south state highway in the U.S. state of Colorado. It runs from U.S. Highway 138 (US 138) and US 385 in Julesburg to the Nebraska state line.
State Highway 103 in the U.S. state of Colorado runs from Interstate 70 (I-70), U.S. Route 6 and US 40 at Idaho Springs to county roads 151 and 103 at Squaw Pass. The 13 miles (19 km) from Idaho Springs to SH 5 forms about half of the Mount Evans Scenic Byway.
Interstate 70 (I-70) is a transcontinental Interstate Highway in the United States, stretching from Cove Fort, Utah, to Baltimore, Maryland. In Colorado, the highway traverses an east–west route across the center of the state. In western Colorado, the highway connects the metropolitan areas of Grand Junction and Denver via a route through the Rocky Mountains. In eastern Colorado, the highway crosses the Great Plains, connecting Denver with metropolitan areas in Kansas and Missouri. Bicycles and other non-motorized vehicles, normally prohibited on Interstate Highways, are allowed on those stretches of I-70 in the Rockies where no other through route exists.
In the U.S. state of Colorado, Interstate 25 (I-25) follows the north–south corridor through Colorado Springs and Denver. The highway enters the state from the north near Carr and exits the state near Starkville. The highway also runs through the cities of Fort Collins, Loveland, and Pueblo. The route is concurrent with U.S. Highway 87 through the entire length of the state. I-25 replaced U.S. Highway 87 and most of U.S. Highway 85 for through traffic.
The Colorado Department of Transportation is the principal department of the Colorado state government that administers state government transportation responsibilities in the state. CDOT is responsible for maintaining 9,144 mile highway system, including 3,429 bridges with over 28 billion vehicle miles of travel per year. CDOT's Mission is "To provide the best multi-modal transportation system for Colorado that most effectively moves people, goods, and information."
U.S. Route 24 (US 24) is a part of the U.S. Highway System that travels from Minturn, Colorado, to Clarkston, Michigan. In the U.S. state of Colorado US 24 extends from Interstate 70 (I-70) and US 6 in Minturn east to the Kansas state line where it continues as US 24 concurrent with I-70.
State Highway 74 (SH 74) is a state highway in the U.S. state of Colorado. Running 18 miles (29 km) from Interstate 70 (I-70) in El Rancho to SH 8 in Morrison, the highway roughly follows a hook-shaped path running northwest–southeast. The section of the route north of the town of Evergreen is known as Evergreen Parkway and is a segment with a four- to six-lane roadway, with the section east of Evergreen mostly two lanes. The other section is known as the Bear Creek Canyon Scenic Mountain Drive, or just Bear Creek Road, and primarily parallels Bear Creek, passing through the towns of Kittredge and Idledale. The route, which is on the outskirts of Denver, passes through several of the city's mountain parks, including Bergen, Dedisse and Red Rocks parks.
Interstate business routes are roads connecting a central or commercial district of a city or town with an Interstate bypass. These roads typically follow along local streets often along a former U.S. route or state highway that had been replaced by an Interstate. Interstate business route reassurance markers are signed as either loops or spurs using a green shield shaped sign and numbered like the shield of the parent Interstate highway.
State Highway 291 (SH 291) is a state highway in the U.S. state of Colorado. SH 291's southern terminus is at U.S. Route 50 in Salida, and the northern terminus is at US 285 north of Poncha Springs.
U.S. Highway 287 is the portion of a north-south highway in Colorado that travels from the Oklahoma state line just south of Campo to the Wyoming state line north of Fort Collins.
U.S. Route 285 is the section north-south highway in Colorado that starts at the New Mexico state line and ends at I-25, US 87, and SH 30 in Denver.