Interstate 25 in Wyoming

I-25
Get started Cheyenne
End buffalo
Length 301 mi
Length 484 km
Route
  • Colorado2 Terry Ranch Road
  • 7-17: Cheyenne
  • 7 College Drive
  • 8
  • 9 West Lincolnway
  • 10 Warren Air Force Base
  • 11 Pershing Blvd
  • 12 Central Avenue
  • 13 Vandehei Avenue
  • 16 Horse Creek Road
  • 17 Torrington
  • 21 Ridley Rd
  • 25 -no name-
  • 29 Whitaker Rd
  • 34 Nimmo Rd
  • 39 Little Bear
  • 47 Bear Creek Road
  • 54 Chug water
  • 57 Ty Basin Rd
  • 65 Slater Rd
  • 66 Hunton Rd
  • 68 Antelope Rd
  • 70 Bordeaux Rd
  • 73 Laramie
  • 78 Wheatland
  • 80 Wheatland
  • 84 Laramie River Rd
  • 87 Johnson Rd
  • 92 Guernsey
  • 94 El Rancho Rd
  • 100 Cassa Rd
  • 104 Middle Bear
  • 111 Glendo
  • 126 Lusky
  • 135 Douglas
  • 140 Douglas
  • 146 La Prele Rd
  • 150 Inez Rd
  • 151 Natural Bridge
  • 154 Barber Rd
  • 156 Bixby Rd
  • 160 East Glenrock
  • 165 Glenrock
  • 182-189: Casper
  • 182 Hat Six Rd
  • 185 Casper
  • 186 Bryon Stock Trail
  • 187 McKinley St
  • 188 Poplar St
  • 189 Shoshonia
  • 191 Wardwell Rd
  • 197 Ormsby Rd
  • 210 Horse Ranch Creek Road
  • 216 Ranch Road
  • 223 -no name-
  • 227 Midwest
  • 235 Tisdale Mtn Rd
  • 246 Powder River Rd
  • 249 TTT Rd
  • 254 Kaycee
  • 265 Reno Rd
  • 280 Middle Fork Rd
  • 291 Trabing Rd
  • 298 Buffalo
  • 299 Buffalo
  • 300

Interstate 25 or I -25 is an Interstate Highway in the U.S. state of Wyoming. The highway runs from the Colorado border at the capital Cheyenne via Casper to Buffalo in the north of the state. The highway has an alternating north and west direction. The highway is 484 kilometers long.

  • 800ZipCodes: Provides a list of all postal codes in the state of Wyoming, covering area code, zip code and map for each city within Wyoming.

Travel directions

The I-25 at the interchange with the I-80 in Cheyenne.

The I-25 in rural Wyoming.

Just south of the capital Cheyenne, Interstate 25 in Colorado enters the state of Wyoming. The highway then exits Fort Collins and Denver. After about 10 kilometers you reach the city of Cheyenne, which has 58,000 inhabitants. A cloverleaf crosses Interstate 80, which comes from Salt Lake City and runs to Omaha. One passes along the west side of Cheyenne, which is constructed in a fine-mesh grid pattern. On the north side of Cheyenne, US 85 exits, heading toward Spearfish in South Dakota. Then begins the long drive north, across the High Plains of Wyoming.

The area along the way is virtually unpopulated, with few exits. Along the way you can see so-called “Buttes”, rock walls of slightly higher plateaus. The largest towns along the way often have no more than a few thousand inhabitants. After about 150 miles, US 26 merges into Nebraska from Scottsbluff. The highway then runs along the North Platte River. At the hamlet of Orin, US 18 turns off toward Lusk, a town in eastern Wyoming. From Douglas, I-25 turns west.

280 kilometers after Cheyenne you reach a somewhat larger town, namely Casper. Casper has a population of 50,000 and is Wyoming’s second largest city. On the north side of Casper, I-25 turns north again, turning US 26which goes to Jackson, at Yellowstone Park, hundreds of miles west. The next leg to Buffalo is possibly even lonelier than the previous 300 kilometres. Driving conditions on the highway can be dangerous during snow storms in the winter, and high winds in the summer can knock over trucks. One passes through an area where there are virtually no roads and signs of civilization. There are only a few hamlets on the 180 kilometers between Casper and Buffalo. However, Buffalo itself is only a village with 3,900 inhabitants. Here, Interstate 25 joins Interstate 90, the highway from Billings in Montana to Rapid City in South Dakota.

  • a2zDirectory: Lists popular attractions in Wyoming, including parks, festivals and holidays of Wyoming.

History

I-25 at Casper.

Most of Interstate 25 in Wyoming was built in the 1960s. In December 1958, the first section north of Cheyenne opened to traffic. The second part that opened was a section between Douglas and Glenrock. Cheyenne’s bypass opened in 1961 and Buffalo’s in 1971. The Cheyenne bypass was completed in 1964, and the Wheatland bypass in 1975. The last section to open was a section north of Casper on February 2, 1982. The longest section to open at one time was in 1968, when it was completed 30 miles (48 kilometers) between Kaycee and Buffalo. Construction cost $183 million for 484 kilometers. Converted to 2010, that’s about $1 billion, or $2 million per kilometer.

Opening history

From Unpleasant Length Date
Exit 10 Exit 17 11 km 12-1958
Exit 146 Exit 161 24 km 01-1959
Exit 54 Exit 65 19 km 09-1959
Exit 185 Exit 188 5 km 11-1960
Exit 244 Exit 251 11 km 11-1960
Exit 92 Exit 97 8 km 06-1961
Exit 188 Exit 189 2 km 08-1961
Exit 97 Exit 105 13 km 07-1962
Exit 140 Exit 146 10 km 07-1962
Exit 189 Exit 195 10 km 08-1964
exit 0 Exit 10 16 km 10-1964
Exit 296 Exit 297 2 km 10-1964
Exit 132 Exit 135 5 km 11-1964
Exit 123 Exit 132 14 km 07-1965
Exit 235 Exit 244 14 km 08-1965
Exit 78 Exit 92 23 km 12-1965
Exit 25 exit 39 23 km 09-1967
Exit 181 Exit 185 6 km 01-1968
Exit 135 Exit 140 8 km 06-1968
Exit 161 Exit 181 32 km 08-1968
Exit 261 Exit 291 48 km 12-1968
Exit 51 Exit 54 5 km 08-1969
Exit 65 Exit 72 10 km 11-1970
Exit 17 Exit 25 13 km 12-1970
Exit 291 Exit 296 8 km 01-1971
Exit 251 Exit 261 16 km 08-1971
Exit 195 Exit 205 16 km 09-1971
Exit 205 Exit 210 8 km 12-1974
Exit 105 Exit 123 29 km 10-1975
Exit 72 Exit 78 10 km 11-1975
exit 47 Exit 51 6 km 09-1976
exit 39 exit 47 13 km 09-1977
Exit 231 Exit 235 6 km 10-1978
Exit 227 Exit 231 6 km 04-1979
Exit 210 Exit 227 27 km 02-02-1982

Traffic intensities

Exit Location 2002 2013
exit 0 border with Colorado 20,000 19,800
exit 8 Cheyenne ( I-80 ) 24,000 18,800
Exit 78 wheatland 8,000 6.800
Exit 135 Douglas 9,000 7,500
Exit 186 Casper 17,000 20,500
Exit 189 Casper ( U.S. 20 ) 22,000 8,300
Exit 227 Midwest 4,000 3,500
Exit 300 Buffalo ( I-90 ) 3,000 2,900

Lane Configuration

From Unpleasant Lanes Comments
exit 0 Exit 300 2×2

Interstate 25 in Wyoming