Interstate 25 South - Thornton to Denver

Advancing south into Adams County, Interstate 25 runs between the Westminster and Thornton city limits to 144th Avenue at Exit 226.
08/15/13

08/15/13

08/15/13

A commercialized diamond interchange at Exit 225 links I-25 with 136th Avenue between north Westminster and Eastlake in Thornton.
08/15/13

Advancing south, Interstate 25 meets the east end of SH 128 and 120th Avenue at Exit 223 along the Northglenn city line.
08/15/13

SH 128 (120th Avenue) runs 14.11 miles west from Thornton and North Glenn into Westminster en route to Broomfield and SH 93 (Foothills Highway) south of Boulder.
08/15/13

Interstate 25 wholly enters Northglenn ahead of the diamond interchange (Exit 221) with 104th Avenue.
08/15/13

08/15/13

Exit 221 departs I-25 south for 104th Avenue. Northglenn, the "Center of the Future" was incorporated in April 1969, had a population of 38,419 per the 2020 Census, and rests at an elevation of between 5,160 and 5,222 feet above sea level.
08/15/13

08/15/13

The succeeding two exits fall within Thornton, the "City of Planned Progress". Named after former Governor Dan Thornton, Thornton was first developed in 1953 and incorporated as a city in 1956. Explosive growth resulted in a major population gain from 82,384 in the 2000 Census to 141,867 in the 2020 Census.
08/15/13

The diamond interchange with Thornton Parkway (92nd Avenue) was constructed in 1985. The exchange was funded primarily through an urban renewal district. The district also funded improvements in Downtown Thornton.
08/15/13

The high rises of Downtown Denver come into view 1.25 miles north of Exit 219 / 84th Avenue. I-25 at this point is around 5,700 feet above sea level.
08/15/13

04/23/17

The forthcoming systems interchange (Exit 217) with U.S. 36 (Denver-Boulder Turnpike) west and Interstate 270 east falls within unincorporated Adams County between Sherrelwood and Welby.
04/23/17

04/23/17

84th Avenue leads west to the city of Federal Heights beyond Huron Street. Federal Heights was incorporated in 1940 and was home to 14,382 as of the 2020 Census.
04/23/17

Interstate 270 east to I-70 leads to Peña Boulevard for Denver International Airport (DEN).
04/23/17

Interstate 76 crosses I-25 at Exit 216 to the immediate south of I-270/U.S. 36. Following the South Platte River en route to Fort Morgan, Sterling and Julesburg, I-76 travels northeast from Denver to I-80 near Big Springs, Nebraska.
04/23/17

Exit 219 leaves I-25 south for 84th Avenue in Thornton ahead of an ingress point for the tolled Express Lanes south into Denver.
04/23/17

Interstate 270 constitutes a 6.91 mile long urban loop linking I-25 south and U.S. 36 (Denver-Boulder Turnpike) east with Interstate 70 to Aurora.
04/23/17

04/23/17

The western Interstate 76 roughly follows the original alignment of U.S. 6 between Denver and Sterling. I-76 parallels U.S. 138 east from Sterling directly to I-80 east for North Platte, Grand Island, Lincoln and Omaha, Nebraska.
04/23/17

04/23/17

U.S. 36 replaced SH 382 along the Denver-Boulder Turnpike in 1967 northwest to Boulder, home of the University of Colorado. U.S. 36 concludes west of Estes Park at U.S. 34 within Rocky Mountain National Park.
04/23/17

Express Lanes accompany Interstate 25 south to 20th Street at Downtown Denver. Express Lanes also run along U.S. 36 northwest to Boulder.
04/23/17

04/23/17

A heavily traveled commuter route, U.S. 36 emerges west from the end of I-270 to Westminster and Broomfield. U.S. 36 east is unmarked along I-270 to Commerce City and Northfield in Denver.
04/23/17

Completed in 2005, the flyover linking I-25 south with I-270 east was the last connection built at the exchange with U.S. 36.
04/23/17

The Denver-Boulder Turnpike was originally built as a toll road in 1952. With the removal of tolls in 1967, U.S. 36 was extended along the freeway northwest.
04/23/17

Prior to 1976, I-76 in Colorado was designated Interstate 80S. The renumbering was part of a nationwide program to eliminate letter-suffixed routes in the Interstate System.
08/15/13

All but 5.78 of the 184.14 miles of Interstate 76 in the Centennial State are east of I-25. The westernmost section of I-76 bypasses Denver to I-70 at Arvada.
08/15/13

A loop ramp (Exit 216B) previously joined I-25 south with I-76 east.
08/15/13

Continuing south into industrial North Washington, the succeeding exit is with 58th Avenue.
04/23/17

04/23/17

Mostly unmarked from I-25, 58th Avenue west to Broadway is part of SH 53, a 1.66 mile long route north to SH 224 (70th Avenue) at Twin Lakes.
04/23/17

58th Avenue continues east from I-25/SH 53 to York Street by the South Platte River and Commerce City line.
04/23/17

04/23/17

Entering the city and county of Denver, I-25/U.S. 87 converges with Interstate 70 at the Mousetrap Interchange (Exit 214) in one mile.
04/23/17

04/23/17