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Interstate 76 - Colorado


The Western Interstate 76 is a diagonal route leading from transcontinental Interstate 80 southwest into Denver. Although it shares a common number with the Eastern Interstate 76, the two routes do not connect, and there is a huge gap between Nebraska and Ohio. Interstate 76 was formerly Interstate 80S, and the designation was changed when most suffixed routes were eliminated.

Passing through the eastern plains of Colorado, Interstate 76 serves the communities of Fort Morgan, Sterling, and Julesburg along the banks of the South Platte River. Although it is very wide river, the South Platte is not very deep. It is not commercially navigable as a result, which is typical of many western rivers. However, development has sprung up along this corridor, partially due to the presence of Interstate 76. In fact, the South Platte River valley even has its own U.S. route, U.S. 138, between Sterling and Big Spring, Nebraska.

Interstate 76 in Colorado also boasts one of the longest business routes in the country, Business Loop I-76 along U.S. 6 from Fort Morgan northeast to Sterling.

Interstate 76 Colorado Highway Guides


The following chart shows the dates on which each section of Interstate 76 was opened, from the western terminus in Denver to the Nebraska State Line.



Distance (Approximate)

From Interstate 70 and Colorado 121 ( Wadsworth Boulevard ) east to Colorado 95 ( Sheridan Boulevard )

December 3, 1985

1.6 miles

From Colorado 95 ( Sheridan Boulevard ) to U.S. 287 ( Federal Boulevard )

November 5, 1987

1.4 miles

From U.S. 287 ( Federal Boulevard ) to Pecos Street

November 1, 1989

1 mile

From Pecos Street east to Interstate 25/U.S. 87

September 15, 1993

1 mile

From Interstate 25/U.S. 87 east to U.S. 85 ( Greeley Highway )

October 11, 1968

4 miles

From U.S. 85 ( Greeley Highway ) to Barr Lake


7 miles

From Barr Lake to Hudson


12 miles

From Hudson to Wiggins


35 miles

Conversion of U.S. 6 on segment near Wiggins into Interstate standards


8 miles

From Wiggins to Fort Morgan


9 miles

From Fort Morgan to Sterling


50 miles

From Sterling northeast to Crook


24 miles

From Crook east to Sedgwick


15 miles

From Sedgwick east to Julesburg

October 24, 1970

15 miles

From Julesburg east to Nebraska State Line

December 1969

4 miles

Construction on what was originally called Interstate 80S began in 1958. Interstate 76 came into existence on January 1, 1976, when Interstate 80S was renumbered as Interstate 76. According to the Colorado Department of Transportation, 488 signs were replaced as a result of this numbering change. For more information on the history of Interstate 76, visit Colorado Department of Transportation 50th Anniversary of the Interstate Highway System.

Page Updated March 14, 2006.