Wyoming Highway 789
 Wyoming Highway 789 | ||||
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| Canada to Mexico Highway | ||||
 WYO 789 highlighted in red | ||||
| Route information | ||||
| Maintained by WYDOT | ||||
| Length | 407.613 mi[1] (655.990 km) | |||
| Major junctions | ||||
| South end |  SH 13 at Colorado state line near Baggs | |||
| North end |  US 310 at the Montana state line north of Frannie | |||
| Location | ||||
| Country | United States | |||
| State | Wyoming | |||
| Counties | Carbon, Sweetwater, Natrona, Fremont, Hot Springs, Washakie, Big Horn | |||
| Highway system | ||||
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Wyoming Highway 789 (WYO 789) is a 407-mile-long (655 km) state highway in the U.S. state of Wyoming. WYO 789 travels south-to-north from the Colorado state line to the Montana state line.[1] For most of its length, it is concurrent with other routes.[2] It was the path of a formerly-proposed U.S. Route 789 that was canceled.[3]
Route description
WYO 789 begins at the Colorado state line just south of Baggs. It travels north for about 4 miles (6.4 km) to Baggs. After Baggs, it continues north for about 45 miles (72 km) until it reaches the county line.[1][2]
After crossing the county line, WYO 789 travels north for about 6 miles (9.7 km) where it reaches exit 187 of I-80/US 30. WYO 789 joins I-80/US 30 eastbound.
I-80/US 30/WYO 789 re-enter Carbon County. Just west of Rawlins, WYO 789 leaves at exit 211, joining I-80 Bus./US 30 Bus. through Rawlins. North of town, WYO 789 intersects US 287 and travels concurrent with it north for 50 miles (80 km) to the county line, after which it passes through Natrona County for about 2 miles (3.2 km).[1][2]
US 287/WYO 789 continue in a northwest direction, passing through the towns of Jeffrey City and Sweetwater Station. About 40 miles (64 km) from Sweetwater Station, US 287/WYO 789 enter Lander. WYO 789 splits from US 287 here and continues northeast for 24 miles (39 km), alone, to Riverton. WYO 789 joins US 26 until they reach Shoshoni. Here, US 26/WYO 789 intersect US 20 where WYO 789 continues north with US 20 west.[1][2]
US 20/WYO 789 continue through the Wind River Canyon into Thermopolis. From there, the highway veers off in a northeasterly direction into Washakie County. From the Washakie county line, the highway travels approximately 21 miles (34 km) before crossing the Big Horn River into Worland where it joins US 16/US 20.[1][2]
Upon crossing into Big Horn County, US 16/US 20/WYO 789 veer back to the northwest and cross back over the Big Horn River after reaching Manderson. It continues on 20 miles (32 km) to the north through Basin and Greybull. Upon reaching Greybull, US 16/US 20/WYO 789 head west and join US 14 for about 5 miles (8.0 km).[1][2]
At that point, WYO 789 separates from the concurrency of US 14/US 16/US 20 and returns to its northern path along with US 310 for about 28 miles (45 km) to the town of Lovell. For about 3 miles (4.8 km), US 310/WYO 789 travels west along US 14 Alt. US 310/WYO 789 then turn north for about 3 miles (4.8 km) to Cowley and then head west about 7 miles (11 km) to Deaver.[1][2]
From Deaver, US 310/WYO 789 travel about 6 miles (9.7 km) north to Frannie, where they straddle the boundary between Big Horn County and Park County. Just to the north of Frannie, US 310/WYO 789 bends slightly to the west, so that the road is actually inside Park County by about 400 feet before reaching the Montana state line. At the state line, WYO 789 ends, while US 310 continues north.[1][2]
History
.svg){kind=small} U.S. Route 789 | |
|---|---|
| Location | Nogales, Arizona, to Sweet Grass, Montana |
| Existed | November 20, 1950–October 14, 1952 |
WYO 789 was part of a 1950s proposal for a border-to-border U.S. Route 789 that would have traveled from Nogales, Arizona, to Sweet Grass, Montana. After the US 789 proposal was rejected by AASHTO on 14 October 1952,[3] US 789 became part of a series of state highways numbered 789 traveling along the proposed route. Wyoming, however, was the only state that actually applied the number exclusively to existing highways (but only in some sections)[clarification needed], whereas the other states simply added a concurrent SR 789 over existing highways. Because of this, all the states except Wyoming eventually deleted the designation and removed the signs.
Major intersections
| County | Location | mi[1] | km | Destinations | Notes | |||
|---|---|---|---|---|---|---|---|---|
| Carbon | | 0.000 | 0.000 |  SH 13 south – Craig, Meeker, Rifle | Continuation into Colorado | |||
| Baggs | 2.525 | 4.064 |   WYO 70 east – Dixon | |||||
| Sweetwater | Creston Junction | 53.249 | 85.696 |     I-80 west / US 30 west – Rock Springs | Southern end of I-80 / US 30 concurrency; I-80 exit 187 | |||
| See I-80 (exits 187-211) | ||||||||
| Carbon | Rawlins | 77.916 | 125.394 |       I-80 east / US 30 east / I-80 BL begins / US 30 Bus. begins – Cheyenne | Northern end of I-80 / US 30 concurrency; southern end of I-80 BL / US 30 Bus. concurrency; I-80 exit 211 | |||
| 77.916 | 125.394 |   US 287 south / I-80 BL east / US 30 Bus. east (3rd Street) / Spruce Street – Laramie | Northern end of I-80 BL / US 30 Bus. concurrency; southern end of US 287 concurrency | |||||
| 79.553 | 128.028 |   US 287 Byp. south (Hingley Boulevard) | Southern end of Chief Washakie Trail | |||||
| | 112.620 | 181.244 |   WYO 73 west – Bairoil | |||||
| | 123.667 | 199.023 |  WYO 220 east / California National Historic Trail / Mormon Pioneer National Historic Trail / Oregon National Historic Trail / Pony Express National Historic Trail – Casper | |||||
| Natrona |
No major junctions | |||||||
| Fremont | | 165.773 | 266.786 |   WYO 135 north – Riverton | ||||
| Sweetwater Station Rest Area | ||||||||
| 195.535 | 314.683 |  WYO 28 west / California National Historic Trail / Mormon Pioneer National Historic Trail / Oregon National Historic Trail / Pony Express National Historic Trail – Rock Springs | ||||||
| Lander | 204.714 | 329.455 |  US 287 north / Chief Washakie Trail north – Dubois, Teton, Yellowstone, Sinks Canyon State Park | Northern end of US 287 concurrency | ||||
| | 216.348 | 348.178 | Ethete Road – Arapahoe | Former WYO 138 | ||||
| Arapahoe | 227.778 | 366.573 | Ethete Road / Sand Creek Massacre Trail west – Arapahoe | Former WYO 137 | ||||
| 228.129 | 367.138 |    WYO 135 south to WYO 136 (Gas Hills Road) – Rawlins, Castle Gardens | ||||||
| Riverton | 229.475 | 369.304 |  US 26 west (Main Street) – Dubois, Yellowstone, Teton | Southern end of US 26 concurrency | ||||
| | 243.059 | 391.166 |  WYO 134 west – Pavillion | |||||
| Shoshoni | 251.318 | 404.457 |  US 20 east / US 26 east (2nd Street east) / Sand Creek Massacre Trail east – Casper | Northern end of US 26 concurrency; southern end of US 20 concurency | ||||
| Hot Springs | | 281.086 | 452.364 |  WYO 173 east (Buffalo Creek Road) | ||||
| Thermopolis | 283.730 | 456.619 |   WYO 120 north – Meeteetse, Cody, Wyoming Dinosaur Center | Access to Hot Springs Memorial Hospital | ||||
| Lucerne | 291.012 | 468.338 |  WYO 172 east (Black Mountain Road) | |||||
| Kirby | 295.805 | 476.052 |  WYO 175 east – Kirby | |||||
| Washakie | | 307.855 | 495.445 |   WYO 431 west / WYO 432 east | ||||
| 315.822 | 508.266 |  WYO 433 north (West River Road) | ||||||
| Worland | 316.484 | 509.332 | To WYO 432 (Railroad Avenue) | |||||
| 316.808 | 509.853 |  US 16 east – Buffalo | Southern end of US 16 concurrency; access to Washakie Medical Center | |||||
| Big Horn | Manderson | 335.451 | 539.856 | WYO 31 east | Unsigned | |||
| 336.055 | 540.828 |   WYO 31 Spur east – Manderson, Hyattville | Officially WYO 31 Spur;[1]: 47 signed as WYO 31[4] | |||||
| | 336.622 | 541.741 | WYO 433 south | |||||
| Basin | 347.072 | 558.558 |  WYO 30 west (C Street) – Burlington | |||||
| | 349.927 | 563.153 |  WYO 36 south (Golf Course Road) | |||||
| Greybull | 354.711 | 570.852 |   US 14 east / US 310 begins (Greybull Avenue) – Shell, Sheridan | US 310 eastern (southern) terminus;[1]: 47 southern end of US 14 / US 310 concurrency; US 310 is unsigned[5][6] | ||||
| | 357.357 | 575.110 | Airport Rest Area | |||||
| 359.690 | 578.865 | US 14 west / US 16 west / US 20 west – Cody, Yellowstone | Northern end of US 14 / US 16 / US 20 concurrency; US 310 becomes signed | |||||
| Lovell | 386.717 | 622.361 |  US 14A east – Burgess Junction | Southern end of US 14A concurrency | ||||
| | 388.454 | 625.156 |  WYO 32 south – Emblem | |||||
| 389.916 | 627.509 | US 14A west – Byron, Powell, Cody | Northern end of US 14A concurrency | |||||
| Cowley | 393.844 | 633.830 |  WYO 35 south | |||||
| Deaver | 399.824 | 643.454 |  WYO 114 south – Garland, Powell, Cody | |||||
| Big Horn–Park county line | Frannie | 405.369 | 652.378 | |||||
| Park | | 407.613 | 655.990 | US 310 north – Bridger, Billings | Continuation into Montana; northern end of US 310 concurrency | |||
1.000 mi = 1.609 km; 1.000 km = 0.621 mi
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See also
References
- ^ a b c d e f g h i j k l State Maintenance Engineer’s Office (October 1, 2017). "Maintenance Section Reference Book" (PDF). Wyoming Department of Transportation. Retrieved February 9, 2026.
- ^ a b c d e f g h Wyoming Transportation Commission (2011). Wyoming Official Highway Map (PDF) (Map). Cheyenne: Wyoming Department of Transportation.
- ^ a b "Canceled U.S. 789 - AARoads - Wyoming". AARoads. June 2, 2023.
- ^ "Google Streetview: 1938 US-20, Manderson, Wyoming" (Map). Google Maps. August 2025. Retrieved February 18, 2026.
- ^ "Google Streetview: WY-789 northbound, Greybull, Wyoming" (Map). Google Maps. October 2024. Retrieved February 18, 2026.
- ^ "Google Streetview: WY-789 southbound, Greybull, Wyoming" (Map). Google Maps. August 2025. Retrieved February 18, 2026.