Interstate 25 in Colorado

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Interstate 25 marker U.S. Route 87 marker

Interstate 25 and U.S. Route 87
I-25 and US 87 highlighted in red
Route information
Maintained by CDOT
Length 298.87 mi[1] (480.98 km)
Major junctions
South end I-25 / US 85 / US 87 near Trinidad
 
North end I-25 / US 87 near Wellington
Location
Counties Las Animas, Huerfano, Pueblo, El Paso, Douglas, Arapahoe, Denver, Adams, Broomfield, Weld, Larimer
Highway system
Colorado State Highways
US 24I-25SH 26
SH 86US 87SH 88

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.

Historical nicknames for this route have included the Valley Highway (through Denver), Monument Valley Highway (through Colorado Springs), and the Pueblo Freeway (through Pueblo). Within El Paso County, the route has been dedicated as the Ronald Reagan Highway.[2][3] In Pueblo County, the route is called John F. Kennedy Memorial Highway.

Interstate 25 is also considered to be part of the unofficial Pan-American Highway.[4]

Route description[edit]

New Mexico state line to Pueblo[edit]

Northbound I-25 between Colorado Springs and Denver.

Following the Santa Fe Trail from New Mexico, Interstate 25 enters Colorado as a typical four-lane Interstate Highway, where its entire route in Colorado lies close to the east side of the Rocky Mountains. The route turns from north to west-northwest as I-25 serves Wootton. After leaving Wootton, I-25 turns back up north and bypasses near the east side of the Trinidad Lake State Park, home of the Trinidad Lake.

Trinidad, a city near the Trinidad Lake, is the first major city that lies along I-25. For the next 30 miles (48 km), I-25 continues north through the rural areas of Colorado until it reaches the small city of Walsenburg, where the business route - I-25 Bus. - junctions with U.S. Highway 160. I-25 then continues in a north-northwest direction until it bypasses the Orlando Reservoir, then turns north from there until it reaches Colorado City. In Colorado City, I-25 interchanges with the east end of the Frontier Pathways Scenic and Historic Byway (SH 165) at exit 74.

After leaving the city, I-25 follows in a north-northeast orientation until it reaches the St. Charles Reservoir just before entering the city of Pueblo, with the first exit within the southern city limits of Pueblo at exit 94.[5] The Arkansas River in Pueblo serves as a feeder to the Lake Pueblo State Park, home of the Pueblo Lake, which is located to the west of the western city limits of Pueblo.[6]

Pueblo to Denver[edit]

a picture of I-25 in Denver
I-25 during rush hour in the largest city I-25 serves, Denver, looking East toward Downtown Denver.

After leaving Pueblo, I-25 continues up north with the Union Pacific Railroad line paralleling closely to the route on the right side after interchanging with Porter Draw at exit 106. By exit 119, the Fountain Creek joins along and travels parallel with I-25, and continues all the way to the Fountain Creek Regional Park in Widefield. I-25 gradually turns from a general north direction to the north-northwest and serves the census-designated place of Buttes at exit 122.

Cheyenne Mountain, as seen from I-25 near Fort Carson. Note the communications antennas at the summit, which are radio antennas for stations broadcasting in Colorado Springs.

As soon as US 85 leaves I-25 at exit 128, I-25 enters the city limits of Fountain. Basically, I-25 serves as the border between the western city limits of Fountain on the east side of I-25 and Fort Carson on the west side. Exit 132 (SH 16) serves the north side of the Fountain Creek Regional Park as well as the entrance to Fort Carson and connects to SH 21 (Powers Boulevard), the eastern bypass for the Colorado Springs metro area. By the time I-25 reaches exit 138, the route crosses into the city limits of Colorado Springs, where the stack interchange with US 24 at exit 139 serves the Evergreen Cemetery and Prospect Lake. I-25 turns west at exit 140, along with the Fountain Creek, where it interchanges with US 85, US 87, and I-25 Bus. I-25 again turns back north by exit 141. Swinging around the west side of downtown Colorado Springs at exit 142,[5] and to the north of the city lies the Colorado College, and is served at exit 143 - Uintah Street. Continuing north and northeast, the highway intersects the north terminus of I-25 Bus. and US 85. The interstate leaves Colorado Springs between exits 153 and 156, where I-25 enters the United States Air Force Academy, going through the east side of the institution.

Map showing I-25 and nearby freeways and major highways in the Denver Metropolitan area

I-25 leaves El Paso County and enters Douglas County at Monument Hill, elevation 7,352 feet, north of Monument. I-25 then continues north through more rural and hilly areas east of the Rocky Mountains until reaching Castle Rock at exit 181. I-25 continues through rural and hilly portions of Douglas County until interchanging with E-470, the partial beltway of Denver as the toll road serves the Centennial Airport and the much larger Denver International Airport.

After entering Arapahoe County, I-25 cuts through the Denver Technological Center (DTC) between Dry Creek Road and Belleview Avenue (exits 196-199). I-25 enters Denver at the I-225 interchange, a spur that detours motorists to I-70 through Aurora, at exit 200. I-25 turns in an westerly direction between Evans Avenue (Exit 203) and Colorado Boulevard (Exit 204). University of Denver lies just to the south of the interstate at Exit 205. It then turns back north after Exit 207. I-25 curves around the west side of downtown Denver,[5] where it can be accessed by I-70 Bus. at exit 210.[5] I-25 then interchanges with I-70 at exit 214 right before leaving the City and County of Denver. [6]

Denver to Wyoming state line[edit]

As I-25 leaves Denver, the route continues up north through unincorporated areas of Adams County and interchanges with I-76, I-270, and the Denver-Boulder Turnpike (US 36). Due to the complexity of this triangle-shaped interchange, it was known to be one of many malfunction junctions throughout the United States. Beyond that interchange, the interstate enters the northern suburbs of the Denver metro area, such as Thornton and Northglenn, and at exit 220, I-25 slips its way through a narrow path between the Badding Reservoir (west side) and the Croke Lake (east side). Development begins to drop off after exit 223 (120th Avenue) after continuing north into Westminster and eastern Broomfield.

At exit 228, I-25 interchanges with the northern termini of E-470 and Northwest Parkway at a stack interchange, with the Larkridge Mall just to the north, served by 160th Avenue (SH 7). As I-25 continues north, it moves through rolling farm and grasslands with the Front Range and high mountains clearly visible to the west while passing through a medley of lakes and reservoirs. It stays generally flat with few moderate climbs in elevation, while also serving smaller cities like Dacono and Firestone to the east and Longmont to the west. This stretch of I-25 in northern Colorado also has large amounts of truck traffic between SH 7 and Wyoming. After some time in the rural farmlands, the interstate enters the Fort Collins/Loveland metro area at exit 255, serving Loveland and Greeley to the east at exits 255 and 257, and continuing north to the Fort Collins city limits south of Harmony Road. The highway runs on the eastern side of Fort Collins, serving Colorado State University at exits 268 and 269 (which is also the most direct route to downtown). After exit 271, I-25 leaves Fort Collins and rolls into more rural grasslands past Wellington. Exits also become few and far between from here to Wyoming as well after gradually turning north-easterly towards the state line.[5][6]

History[edit]

Ancestors and early freeways[edit]

Colorado had begun planning of a modern inter-city route along the Front Range as early as 1944, well before the national movement toward an Interstate Highway system.

State Highway 1, an unpaved road, was completed between Denver and Pueblo by 1919. Average travel time between Pueblo and Colorado Springs on this route was approximately 2.5 hours (or a full 8.5 hours from Pueblo to Denver). This route was upgraded with the help of the federal government to become US 85 and US 87 by 1930, now paved in concrete and shortening the travel time between Pueblo and Colorado Springs to just one hour.

The cities of Denver (in 1948) and Pueblo (in 1949) were first to begin building multi-lane highway segments along the route of what would eventually become Interstate 25. Construction follows an earlier segment of the Colorado and Southern Railway. Denver's segment was originally known as the Valley Highway and was completed by 1958. The city of Colorado Springs followed a similar theme with their Monument Valley Freeway, begun in 1955 and completed by July 1960. Pueblo's section — the Pueblo Freeway - was complete by July 1959.[3]

Interstate completion[edit]

As the national Interstate Highway System began to take shape, actual "inter-state" connections began to be made. Wyoming came first in 1964, building a 9-mile (14 km) link north to Cheyenne that was connected to Colorado's 17-mile (27 km) stretch.

Linking to New Mexico in the south would prove more problematic as the planned route had to stretch over Raton Pass, and its accompanying 1,800-foot (550 m) elevation change, within just 13 miles (21 km). Once again, US 85 and US 87 were used, but it had to be re-graded in places to meet Interstate design guidelines. Construction began in 1960, with a link to the city of Trinidad completed by 1963. The Trinidad Segment (as CDOT now calls the Raton Pass span) was not fully completed until 1968.

The final segment of the Colorado portion of Interstate 25, connecting the cities of Walsenburg and Trinidad, was completed during 1969. This meant that four lanes of high-speed, nonstop freeway were finally open for a full 305 miles (491 km) from New Mexico north to Wyoming.[3][7]

Modern expansion[edit]

As both population and traffic increased in Colorado during the 1990s and 2000s, the Colorado Department of Transportation has planned and completed major improvements for the city corridors along I-25.

T-REX (Denver)[edit]

T-REX Logo

The first of these was Transportation Expansion (T-REX), which widened and expanded nearly 17 miles (27 km) of both I-25 and the I-225 bypass in the Denver Metropolitan Area as well as adding various pedestrian and aesthetic improvements. T-REX was also instrumental in expanding Denver's RTD light rail lines to connect outlying communities beyond the city and county of Denver, adding 19 miles (31 km) of new routes.[7][8]

Starting in early 2004, the T-REX project was completed during 2006 at a cost of US$1.67 billion, under its projected budget and two years ahead of its originally scheduled conclusion. It has been hailed as a "model for other cities to follow" and "ahead of the curve nationally" by federal transportation and transit authorities.[8]

COSMIX (Colorado Springs)[edit]

COSMIX Logo

As T-REX began to wrap up, CDOT's next major effort began with Colorado Springs Metro Interstate Expansion (COSMIX). It could be argued that COSMIX was even more important to Colorado's interests than T-REX had been, since the Colorado Springs corridor of I-25 had seen immense growth over the past four decades, and experienced major choke points all along the 16-mile corridor from Exit 135 (Academy Blvd) in the south to Exit 151 (Briargate Pkwy) in the north. Originally carrying around 8500 vehicles per day in 1960, usage of the former Monument Valley Freeway had grown to an average of 100,000 vehicles per day by 2005.[9]

The major goals of COSMIX, which began in 2005 and was completed a year and four days ahead of schedule at the very end of December 2007, were a general expansion and widening of the corridor to three lanes in each direction throughout the city, as well as the reconstruction of two main interchanges (at Bijou Street near downtown Colorado Springs, and at Rockrimmon Boulevard and North Nevada Avenue in the city's growing north side).[10] Originally estimated at $225 million, on delivery COSMIX cost only $150 million, approximately $20 million of which involved land acquisition costs.

COSMIX was the first funded portion of a larger plan for I-25 improvements as detailed in an Environmental Assessment approved by CDOT and FHWA in 2004. A second phase resulted in the widening of the 12 mile segment from Woodmen Road (exit 149) to Monument (exit 161) to six lanes and addition of auxiliary lanes at busy interchanges. The Air Force Academy interchange (exit 156) was reconfigured to include just one exit, instead of A/B, and features two new roundabouts for North Gate Boulevard. The widening and paving was completed in December 2014.[11]

An EA-recommended improvement not included in COSMIX due to funding limitations was the reconstruction of the I-25 interchange at Cimarron Street (US 24 West). CDOT completed this project in late 2017.

Future[edit]

A new "lane balance" project has begun in northern Douglas County (Lone Tree) from Lincoln Avenue to County Line Road, where CDOT will expand the highway to eight lanes to eliminate the current six lane bottleneck from drivers coming from Castle Rock to the south into Denver. This will connect the existing eight lanes from RidgeGate Parkway to the terminus of the previous T-REX project from years earlier at County Line Road.[12]

Toll lanes will be added along I-25 from US 36 (exit 217) to 120th Avenue (exit 223) in the Thornton area starting in October 2013. Two lanes (one north, one south) will be operational for drivers wishing to cut through traffic by paying a toll, similar to the US 36 project. The highway will have to be expanded and reconstructed to add the additional lanes to the six lane configuration currently in place. The project should be complete by October 2015.[13]

There is much controversy surrounding the future of Interstate 25 in northern Colorado (SH 7 in Broomfield to SH 14 in Fort Collins). Suggestions from adding toll lanes to general expansion to six lanes from the two lane bottleneck at SH 66 to SH 14 and adding multi-modal transportation options have been discussed. The future of the highway remains in question as funding is limited, and agreement is limited as well. The I-25 corridor in Weld and Larimer counties is becoming increasingly heavy with traffic, and something will have to be done soon.[14]

Officials are planning on expanding Interstate 25 from mile marker 160 just south of Monument to mile marker 179 south of Castle Rock. This is the only four lane, two lanes north bound and two lanes south bound on the interstate in Colorado. This eighteen-mile stretch is going to have an Express lane added in each north and south bound directions. The express lane will be a toll lane to allow commuters and people willing to pay a variable toll to use the additional lane. The complete project has a budget for $350 million dollars secured through federal, state and county funds. The final designs are set to be completed the summer of 2018 and construction to start by November 2018. Additional information is to be updated by the end of June 2018. [15]

The seven mile segment of I-25 through Pueblo also is in need of reconstruction, and the subject is of much controversy in southern Colorado. On the agenda are expanding the now 60-year-old interstate to six lanes, adding additional auxiliary lanes, and improving many interchanges to bring them up to current standards. The road segment from exit 101 (US 50/SH 47) to exit 94 (SH 45/Pueblo Boulevard) is currently the oldest section of I-25 in the state, and has not been upgraded since the 1950s, minus minor alterations and paving. The controversy surrounds the straightening of the highway through the city and the possible removal of several businesses around the downtown area and the historic district.[16]

Exit list[edit]

CountyLocationmi[1]kmExitDestinationsNotes
ColoradoNew Mexico line0.0000.000 I-25 / US 85 / US 87 south – Santa Fe, AlbuquerqueContinuation into New Mexico
460Truck weigh stationNorthbound entrance extends into Colorado; exit number is based on New Mexico mileage
Las Animas2.1343.4342Wootton
5.5979.0076Gallinas
7.52912.1178Springcreek
11.01317.72411Santa Fe Trail – Starkville
Trinidad13.00020.92113AVan Buren Street
13.31121.42213B SH 12 west (Main Street) – Cuchara, La Veta, Springfield
13.90622.38014Commercial Street
14.85923.91315 SH 239 north / US 160 east / Goddard Avenue, Kit Carson TrailSouth end of US 160 overlap
17.72828.53018El Moro Road
22.90636.86423Hoehne Road
26.85843.22427Ludlow
30.46449.02730Aguilar Road
34.09054.86334Aguilar
Huerfano40.48565.15441Rugby Road
41.93067.48042Pryor
Walsenburg49.00078.85849 I-25 Bus. north to US 160 west – Walsenburg, Alamosa
50.05480.55450 SH 10 east (US 160 west) – La JuntaNorth end of US 160 overlap
52.32184.20252 I-25 Bus. south / SH 69 west to US 160 west – Gardner, Westcliffe
55.00088.51455Airport Road
56.00090.12356Redrock Road
58.72794.51259Butte Road
60.08496.69660Huerfano
64.046103.07264Lascar Road
66.749107.42267Apache
PuebloColorado City71.264114.68871Graneros Road
74.367119.68274 SH 165 west – Colorado City, Rye, San Isabel
77.267124.34977Abbey Road, Hatchet Ranch Road
83.461134.31783Brantzwell
86.938139.91387Verde Road
87.921141.49588Burnt Mill Road
90.625145.84791Stem Beach
Pueblo94.769152.51694 SH 45 north (Pueblo Boulevard)
95.403153.53695Illinois AvenueSouthbound exit only
95.901154.33896Minnequa Avenue, Indiana AvenueSouthbound exit to Minnequa Ave., one block north of Indiana Ave.; Northbound exit to and entrance from Indiana Ave.; Southbound entrance from Aqua Ave., one block south of Indiana Ave.
96.673155.58097ACentral Avenue to Northern Avenue
97.447156.82697BAbriendo Avenue
97.691157.21898A
US 50 Bus. east – La Junta
98.545158.59398B To SH 96 / 1st Street
98.806159.01399A To SH 96 / 6th StreetSouthbound exit and northbound entrance (from Bradford Avenue)
99.334159.86399B13th Street, Santa Fe Avenue
99.950160.854100A US 50 east – La Junta, Pueblo Memorial AirportSouth end of US 50 overlap
100.681162.030100B29th Street
101.389163.170101 US 50 west / SH 47 east – Cañon CityNorth end of US 50 overlap
102.160164.411102Eagleridge Boulevard
103.896167.204104Eden
106.075170.711106Porter Draw
108.000173.809108Purcell Boulevard – Pueblo West
110.238177.411110Pinon
114.000183.465114Young Hollow
115.831186.412116County Line Road
El Paso118.843191.259119Rancho Colorado Boulevard
Fountain121.459195.469122Pikes Peak International Raceway
123.189198.253123Clear Spring RanchExit does not sign this destination
124.564200.466125Ray Nixon Road
127.860205.771128 US 85 north – FountainNorth end of US 85 overlap
131.653211.875132 SH 16 east (Mesa Ridge Parkway) to SH 21 – Fort Carson Gate 20Signed as exits 132A (SH 16) and 132B (Ft. Carson) southbound
Stratmoor135.262217.683135Airport Sign.svg South Academy Boulevard – Colorado Springs Airport
Colorado Springs137.752221.690138Lake Avenue, Circle Drive
138.742223.284139 US 24 east (Martin Luther King Jr. Bypass) – LimonSouth end of US 24 overlap
139.747–
139.869
224.901–
225.097
140 SH 115 south (Nevada Avenue, Tejon Street) – Cañon City
141.139227.141141 US 24 west (Cimarron Street) – Manitou Springs, Pikes PeakNorth end of US 24 overlap
141.849228.284142Bijou Street – Downtown Colorado Springs
142.832229.866143Uintah Street
143.520230.973144Fontanero Street
144.622232.747145Fillmore Street
146.074235.083146Garden of the Gods Road
147.245–
148.030
236.968–
238.231
148Nevada Avenue (US 85 south), Corporate Drive, Rockrimmon BoulevardSouth end of US 85 overlap
148.830239.519149Woodmen Road
150.303241.889150North Academy Boulevard
151.660244.073151Briargate Parkway
152.899246.067153 To SH 21 (Powers Boulevard) / InterQuest Parkway – Black Forest
Air Force Academy155.930250.945156North Gate Boulevard – North Entrance Air Force Academy
158.199254.597158Baptist Road
Monument160.763258.723161 SH 105 – Monument, Palmer Lake
El PasoDouglas
county line
163.321262.840163County Line Road – Palmer Lake
Douglas167.464269.507167Greenland
171.820276.517172Upper Lake Gulch RoadPrimary backup for Spruce Mountain Road. The road Between Exit 173 and Spruce Mountain Road was Numbered SH 18 until 2001 and is current CR 56.
Larkspur172.307277.301173Spruce Mountain RoadSouthbound exit and northbound entrance. Numbered SH 1 Between about 1920 to 1968.
173.791279.690174Tomah Road
Castle Rock180.808290.982181Plum Creek Parkway
181.853292.664182Wilcox Street, Wolfensberger Road
184.212296.460184 US 85 north (Meadows Parkway) / SH 86 east / Founders ParkwayNorth end of US 85 overlap
186.935300.843187Happy Canyon Road
188.486303.339188Castle Pines Parkway
Lone Tree192.096309.149192RidgeGate ParkwayOpened on May 20, 2009[17]
192.990310.587193Lincoln Avenue
194.314312.718194 SH 470 west / E-470 east – Grand Junction, LimonE-470 exit 1.
DouglasArapahoe
county line
Lone TreeCentennial line195.130314.031195County Line Road
ArapahoeCentennial196.141315.658196Dry Creek Road
197.188317.343197 SH 88 east (Arapahoe Road)South end of SH 88 overlap
Greenwood Village198.292319.120198Orchard Road
199.384320.877199 SH 88 west (Belleview Avenue)North end of SH 88 overlap
City and County of Denver200.093322.018200 I-225 north to I-70 – Limon, AuroraI-225 exits 1A-B southbound; tri-stack interchange.
201.578324.408201 US 285 south / SH 30 east (Hampden Avenue)
202.640326.117202Yale Avenue
203.537327.561203Evans Avenue
204.037328.366204 SH 2 (Colorado Boulevard)
205.057330.007205University Boulevard
205.919331.395206Downing Street, Washington Street, Emerson StreetDowning St. not signed southbound
207ALincoln Street, BroadwayLincoln St. not signed southbound
207BSanta Fe Drive to SH 26Northbound exit and southbound entrance
US 85 south (Santa Fe Drive)South end of US 85 overlap; southbound exit and northbound entrance
207.641–
207.990
334.166–
334.727
208 SH 26 (Alameda Avenue)Southbound exit and northbound entrance; northbound access is via exit 207B
209.210336.691209 US 6 west (6th Avenue) – LakewoodSouth end of US 6 overlap; signed as exits 209A (east) and 209B (west)
209.479337.124209C8th Avenue
210.310338.461210A US 40 / US 287 (Colfax Avenue) – Downtown Denver
210.415338.630210BAuraria ParkwayNorthbound exit and southbound entrance
210.532338.818210C17th AvenueNorthbound exit and entrance; southbound access is via exit 211
211.109339.74721123rd Avenue, 20th Avenue20th Ave. not signed northbound
211.464340.318212A-BSpeer Boulevard – Downtown DenverSigned as exits 212A (south) and 212B (north)
212.096341.335212C20th Street
I-25 HOV/toll lanesSouth end of reversible HOV/toll lanes
19th StreetSouthbound exit and northbound entrance for HOV/toll lanes only
212.769342.419213Park Avenue, West 38th Avenue
213.625–
213.739
343.796–
343.980
214A I-70 (US 6 east/US 85 north) – Limon, Grand JunctionNorth end of US 6/US 85 overlap; locally known as The Mousetrap; I-70 exit 274
213.964344.342214B48th AvenueSouthbound exit only
AdamsNorth Washington215.244346.40221558th Avenue
216.301348.103216A I-76 east – Fort MorganNorthbound exit and southbound entrance; I-76 exit 5
Welby216.397–
216.779
348.257–
348.872
216B SH 224 (70th Avenue) / I-76 west – Grand JunctionSigned as exit 216 southbound; SH 224 not signed southbound; I-76 exit 5
SH 224 (70th Avenue)Northbound exit and southbound right entrance for HOV/toll lanes only
217.006349.237217 I-270 east / US 36 – Limon, Aurora, Westminster, BoulderNo access to I-270/US 36 east northbound; southbound signed as exits 217A (west) and 217B (east); I-270 exit 0 to I-25 north.
US 36 west – BoulderSouthbound right exit and northbound entrance for HOV/toll lanes only
I-25 HOV/toll lanesNorth end of reversible HOV/toll lanes
Thornton218.463351.58221984th Avenue – Federal Heights
219.815353.758220Thornton Parkway
Northglenn221.027355.708221104th Avenue – NorthglennFormer SH 44
223.049358.963223 SH 128 west (120th Avenue)
Westminster225.000362.102225136th Avenue
226.085363.849226144th Avenue
City and County of Broomfield227.745366.520228 E-470 east / Northwest Parkway west – Limon, BroomfieldE-470/NW Pkwy. exit 47
229.107368.712229 SH 7 – Lafayette, Brighton
Weld232.094373.519232Dacono, Erie
235.114378.379235 SH 52 – Dacono, Frederick, Fort Lupton
240.114386.426240 SH 119 west – Firestone, Longmont
243.148391.309243 SH 66 – Longmont, Lyons
Mead245.217394.639245Mead
Johnstown250.241402.724250 SH 56 west – Berthoud
252.261405.975252 SH 60 east – Johnstown, Milliken
Larimer254.216409.121254 To SH 60 west – Campion
255.272410.820255 SH 402 west – Loveland
Loveland257.305414.092257 US 34 – Greeley, Loveland
259.309417.317259Airport Sign.svg Crossroads Boulevard – Fort Collins-Loveland Airport
262.298422.128262 SH 392 – Windsor, Fort Collins
Fort Collins265.314426.981265Harmony Road
268.475432.069268Prospect Road
269.370–
269.570
433.509–
433.831
269A-B SH 14 – Fort Collins, AultSigned as exits 269A (east) and 269B (west)
271.373436.733271Mountain Vista Drive
Wellington277.884447.211278 SH 1 south – Wellington
281.338452.770281Owl Canyon Road
287.550462.767288Buckeye Road
Weld292.583470.867293Carr
298.870480.985 I-25 / US 87 north – Cheyenne, CasperContinuation into Wyoming
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

References[edit]

  1. ^ a b Colorado Department of Transportation, Highway Data, accessed October 2007: note that not every interval between mileposts is exactly a mile, explaining why more exits than expected are at the exact milepost
  2. ^ Ronald Reagan Presidential Foundation & Library Archived July 25, 2008, at the Wayback Machine.
  3. ^ a b c "Interstate 25". Dot.state.co.us. Retrieved 2011-11-27.
  4. ^ Sierra County Economic Development Organization. "Transportation and Highways". Archived from the original on September 7, 2007. Retrieved February 2008. Check date values in: |accessdate= (help)
  5. ^ a b c d e The Road Atlas (Map). Rand McNally. 2006. p. 32.
  6. ^ a b c Google Maps street maps and USGS topographic maps, accessed February 2008 via ACME Mapper
  7. ^ a b Kuennen, Tom, ed. Interstate 50: 50 Years of the Dwight D. Eisenhower National System of Interstate and Defense Highways. 2006: Faircount. pp 118-119. ISBN unavailable.
  8. ^ a b "Metro Denver's multi-modal T-REX takes last step - Metro Denver Economic Development Corporation". Metrodenver.org. Retrieved 2011-11-27.
  9. ^ Kuennen, Tom, ed. Interstate 50: 50 Years of the Dwight D. Eisenhower National System of Interstate and Defense Highways. 2006: Faircount. pp 118-119. ISBN unavailable.
  10. ^ "Progress of Project". Cosmixproject.com. Archived from the original on January 13, 2010. Retrieved 2011-11-27.
  11. ^ http://www.koaa.com/news/i-25-expansion-project-nears-completion/
  12. ^ "I-25 Lincoln Avenue to County Line Road Lane Balancing Project Has Begun". coloradodot.info.
  13. ^ "Project Overview". coloradodot.info.
  14. ^ "North I-25 (Denver to Wyoming)". coloradodot.info.
  15. ^ https://www.codot.gov/projects/i-25-south-monument-castle-rock-ea
  16. ^ Shanna Lewis. "Expansion Plans for I-25 in Pueblo". krcc.org.
  17. ^ "RidgeGate Parkway Interchange Brings Traffic Relief to Douglas County" (PDF). Southeast Connections. June 2009. Retrieved 2011-11-27.

External links[edit]

Route map:

KML is from Wikidata


Interstate 25
Previous state:
New Mexico
Colorado Next state:
Wyoming
U.S. Route 87
Previous state:
New Mexico
Colorado Next state:
Wyoming