About CDOT

Interstate 25 History

Interstate Construction Completed

I-25 construction was finished in Colorado on Sept. 21, 1969, with the opening of a 21-mile segment south of Walsenburg ( Rugby area). Total length of I-25 in CO: 299 miles

Cost: $125 million 

Segment

Location/Description

Completion

Denver

11.2 miles, Valley Highway

48 th Ave. to Evans, Fully opened 1958

Pueblo

9.2 miles through Pueblo

Opened July 1, 1959

Colorado Spgs.

12 miles through the city

Opened July 1, 1960

South of Pueblo to Monument

67 miles, south of Pueblo to north of Colorado Springs

Opened by 1961

Denver Northside

N. end of Valley to 58 th , .5 miles

Opened in 1961

Longmont Area

SH 7 to SH 66, 14 miles

Opened in 1961

Trinidad

Elevated portion, approx. 3 mi.

Completed in 1963

Castle Rock to Denver

Approximately 25 miles

Completed in 1963

Denver north

58 th Ave. to SH 7, 14 miles

Completed in 1963

North of Denver

SH 66 to U.S. 34, 14 miles

Completed in 1963

Walsenburg

Walsenburg Bypass

Completed in 1964

North Link

17 miles, N of Wellington ( Buckeye Road ) to Border

Completed Oct. 11, 1966

Colorado City

SH 165 to Pueblo Blvd. , 20 miles

Completed in 1965

Monument Hill

Monument to Larkspur, 12 miles

Completed in 1965

Ft. Collins Area

U.S. 34 to SH 68 (Harmony), 8 mi.

Completed in 1965

Trinidad/Raton Pass

S. edge of Trinidad to Raton Pass at New Mexico Line – 13 mi.

Completed in 1966

Walsenburg to Colorado City

22 miles

Completed in 1968

Larkspur to Castle Rock

9 miles

Completed in 1968

SH 68 to North of Wellington

Harmony Rd. Ft. Collins to Buckeye Road , 23 miles

Completed in 1968; I-25 continuous from Walsenburg to Colorado/Wyoming border

Trinidad to Walsenburg

21 mile segment

Completed in 1969; I-25 in Colorado complete



 

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