Wyoming Highway 789
|Canada to Mexico Highway|
|Maintained by WYDOT|
|Length:||404 mi (650 km)|
|South end:||SH 13 at Colorado state line near Baggs|
WYO 120 in Thermopolis
US 16 in Worland
US 14 / US 310 in Greybull
WYO 114 near Deaver
|North end:||US 310 at the Montana Border near Frannie|
|Counties:||Carbon, Sweetwater, Natrona, Fremont, Hot Springs, Washakie, Big County|
Wyoming Highway 789 (WYO 789) is a state route in the U.S. state of Wyoming in the United States. Wyoming Highway 789 runs north to south from the Montana border to the Colorado border. For most of its length, it is joined with other routes.
Route description 
Wyoming Highway 789 begins at the Colorado border just south of Baggs. It travels north for about four miles (6 km) to Baggs. After Baggs, it continues north for about 45 miles (72 km) until it reaches the county line.
Wyoming Highway 789, with I-80 and US 30, re-enters Carbon County. Just west of Rawlins, Wyoming Highway 789 leaves at Exit 211, joining Business Loop 80 through Rawlins. North of town, Wyoming Highway 789 intersects U.S. Route 287 and joins 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).
WYO 789/US 287 continue bearing in a northwest direction, passing through the towns of Jeffrey City and Sweetwater Station. About 40 miles (64 km) from Sweetwater Station, WYO 789/US 287 enters Lander. Wyoming Highway 789 splits from US 287 here and continues northeast for 24 miles (39 km), alone, to Riverton. Wyoming Highway 789 joins U.S. Route 26 until they reach Shoshoni. Here, Wyoming Highway 789/US 26 intersect U.S. Route 20 where WYO 789 continues north with US 20 west.
WYO 789 and US 20 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 U.S Routes 16 and 20.
Upon crossing into Big Horn County, WYO 789/US 16/US 20 veers back to the northwest and crosses 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, WYO 789/US 16/US 20 head west and join US 14 for about five miles (8 km).
At that point, Wyoming Highway 789 separates from the multiplex of US 14/16/20 and returns to its northern path along with US 310 for about 28 miles (45 km) to the town of Lovell. For three miles (5 km), WYO 789/US 310 runs west along Alternate US 14. WYO 789/US 310 then turns north three miles (5 km) to Cowley and then heads west seven miles (11 km) to Deaver.
From Deaver, WYO 789/US 310 runs six miles (10 km) north along the Park County line to Frannie. The highway leaves Wyoming on the eastern edge of Park County and enters Montana. Here, the 789 designation is dropped, while US 310 continues along the highway.
Highway 789 was part of a proposed border-to-border U.S. Route 789 that would have run from Sweetgrass, Montana to Nogales, Arizona. After the US 789 proposal was rejected by AASHTO, U.S. Route 789 became part of a series of state highways numbered "789" running along the proposed route. Wyoming, however, was the only state that actually applied the number to an existing highway (the other states simply added a concurrent SR 789 over existing highways). Because of this, all the states except Wyoming deleted the designation and removed the signs.
Major intersections 
||0.00||0.00||SH 13||Continuation into Colorado|
|Baggs||2.52||4.06||WYO 70||Western terminus of WYO 70|
||near Creston Junction||53.19||85.60||I-80 / US 30||Exit 187 (I-80/US 30); western terminus of I-80 / US 30 / WYO 789 overlap|
I-80 / US 30 / I-80 Bus. / US 30 Bus.
|Exit 211 (I-80/US 30); eastern terminus of I-80 / US 30 / WYO 789 overlap; western terminus of I-80 BUS / US 30 BUS / WYO 789 overlap|
US 287 south / I-80 Bus. / US 30 Bus.
|Southern terminus of US 287 / WYO 789 overlap; eastern terminus of I-80 BUS / US 30 BUS / WYO 789 overlap|
US 287 Byp.
|Northern terminus of US 287 Bypass|
|Lamont||112.47||181.00||WYO 73||Eastern terminus of WYO 73|
|Muddy Gap Junction||123.52||198.79||WYO 220||Western terminus of WYO 220|
||No major intersections in Natrona County|
||Sweetwater Station||165.63||266.56||WYO 135||Southern terminus of WYO 135|
|south of Lander||195.82||315.14||WYO 28||Eastern terminus of WYO 28|
|Lander||204.00||328.31||US 287 north||Northern terminus of US 287 / WYO 789 overlap|
|near Hudson||215.59||346.96||WYO 138||Western terminus of WYO 138|
|south of Riverton||227.02||365.35||WYO 137 to WYO 138||Eastern terminus of WYO 137|
|227.38||365.93||WYO 135 to WYO 136||Northern terminus of WYO 135|
|Riverton||228.73||368.11||US 26 west||Western terminus of US 26 / WYO 789 overlap|
|242.61||390.44||WYO 134||Eastern terminus of WYO 134|
|Shoshoni||250.87||403.74||US 20 / US 26 east||Eastern terminus of US 26 / WYO 789 overlap; eastern terminus of US 20 / WYO 789 overlap|
||280.62||451.61||WYO 173||Western terminus of WYO 137|
|Thermopolis||283.27||455.88||WYO 120||Southern terminus of WYO 120|
|Lucerne||290.55||467.59||WYO 172||Western terminus of WYO 172|
||307.28||494.52||WYO 431 west / WYO 432 east||Eastern terminus of WYO 431; southern terminus of WYO 432|
|Worland||315.35||507.51||WYO 433||Southern terminus of WYO 433|
|316.01||508.57||To WYO 432||To WYO 432|
|316.33||509.08||US 16 east||Southern terminus of US 16 / US 20 / WYO 789 overlap|
||Manderson||334.98||539.10||WYO 31||Western terminus of WYO 31|
|west of Manderson||336.15||540.98||WYO 433||Northern terminus of WYO 433|
|Basin||346.60||557.80||WYO 30||Eastern terminus of WYO 30|
|north of Basin||349.45||562.39||WYO 36||Northern terminus of WYO 36|
|Greybull||354.23||570.08||US 14 east||Eastern terminus of US 14 / US 16 / US 20 / US 26 / WYO 789 overlap|
|359.21||578.09||US 14 west / US 16 west / US 20 west / US 310 north||Western terminus of US 14 / US 16 / US 20 / US 26 / WYO 789 overlap; Southern terminus of US 310 / WYO 789 overlap|
|Lovell||386.24||621.59||US 14A east||Eastern terminus of US 14A / US 310 / WYO 789 overlap|
|387.98||624.39||WYO 32||Northern terminus of WYO 32|
|389.44||626.74||US 14A west||Western terminus of US 14A / US 310 / WYO 789 overlap|
|Deaver||399.35||642.69||WYO 114||Eastern terminus of WYO 114|
|near Frannie||407.14||655.23||US 310||Continuation into Montana|
|1.000 mi = 1.609 km; 1.000 km = 0.621 mi|
- Wyoming Routes 500-789
- Wyoming Highway 789
- WYO 789 - US 310/Montana State Line to CO-13/Colorado State Line (see Wyoming 789)