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U.S. Route 50 in Utah

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U.S. Route 50 marker

U.S. Route 50
Route information
Defined by Utah Code §72-4-110
Maintained by UDOT
Length: 334.920 mi[1] (539.001 km)
Existed: 1926 – present
Major junctions
West end: US 6 / US 50 at the Nevada state line (east of Baker, NV)
  US-6 in Delta
I-15 in Holden
I-15 in Scipio
I-70 / US-89 in Salina
US-6 / US-191 near Green River
US-191 at Crescent Junction
East end: I-70 / US 6 / US 50 at the Colorado state line (west of Fruita, CO)
Highway system
  • State highways in Utah
SR-48 SR-51

U.S. Route 50 (US-50) in Utah crosses the center of the state. The highway serves no major population centers in Utah, with the largest city along its path being Delta. Most of the route passes through desolate, remote areas. Through the eastern half of the state the route is concurrent with Interstate 70 (I-70). US-50 both enters and exits Utah concurrent with US-6, however the two routes are separate through the center of the state.

Three completely different routings of US-50 have existed between Green River and Ely, Nevada. The route between these cities has become progressively shorter as new roads have been paved through this largely uninhabited region of both states. The earlier routings were a result of a dispute between Utah and Nevada over which auto trails would be paved and converted to U.S. Highways.

Route description[edit]

I-70 (and US-50) routed through Spotted Wolf Canyon

The highway enters Utah from Nevada in a desolate portion of the Great Basin desert. Similar to many portions of the route in Nevada, there are no services from this point to Delta, a span of roadway that is about 100 miles (160 km).[2] While passing through the Great Basin the highway crosses two mountain ranges, the Confusion Range via kings canyon and House Range via Skull Rock Pass, before arriving at the shore of Sevier Lake. Sevier Lake is an intermittent lake which is fed by snow melt from many mountain ranges in the eastern half of the Great Basin. From US-50, water is only usually visible in the spring months. The highway follows Sevier Lake to Delta.[2]

The scenery dramatically changes as US-50 approaches Delta, where U.S. Route 6 and 50 separate. As the road approaches Delta, a straight passage across desert changes to zigzags through farming areas. The highway continues to zigzag through farms until arriving at more mountainous terrain at Holden. At Holden, the highway merges with Interstate 15 to cross the Pavant Range at Scipio Summit. US-50 then separates from this freeway to meet Interstate 70 in Salina. The two highways run concurrent from this point east to Colorado. Yet again, there is a stretch of highway 110 miles (180 km) long without services from Salina to Green River.[2]

While co-routed with I-70, US-50 crosses the Wasatch Plateau and passes through the San Rafael Swell. The construction of I-70 through the swell is noted as one of the engineering marvels of the Interstate Highway System.[3] One specific feat, the excavation through a portion called Spotted Wolf Canyon, required excavating 3,500,000 cubic yards (2,700,000 m3) of rock to have a bed for just 8 miles (13 km) of roadway. Construction workers noted that prior to the construction of the freeway a man could stand in this canyon and touch both sides of the canyon wall.[4]

US-6 rejoins US-50 near Green River. The three routes run concurrent and follow the southern edge of the Book Cliffs to Grand Junction, Colorado. Once again, services are not present from Thompson Springs to Fruita, Colorado, a span of about 60 miles (97 km).[2] This portion of US-50 is part of the Dinosaur Diamond Prehistoric Highway, a National Scenic Byway. The name of the byway comes from the large number of areas along the route with visible dinosaur remains.[5]


US-50 descending from Skull Rock Pass in western Utah

The modern route of U.S. Route 50 between Ely, Nevada and Green River, Utah is the third iteration.

First iteration[edit]

In 1926, when the U.S. Highway system was first announced, there was a gap in US-50 between Ely and Thistle.[6] At the time the states of Utah and Nevada were feuding about which of the old auto trails would be paved and used for the new U.S. Highway System. Nevada favored the Lincoln Highway, which the modern US-50 closely follows in that state. Utah refused to consider the Lincoln Highway west of Salt Lake City. Officials perceived that route would carry all California bound traffic directly to Nevada while passing through very few communities in Utah. Utah instead favored the Victory Highway (modern Interstate 80 west of Salt Lake) and the Arrowhead Trail (modern Interstate 15). By favoring these routes Utah could force travelers destined for southern California to use a different route than those destined for northern California, with both of these traversing through more cities in Utah than the Lincoln Highway. The Arrowhead trail was especially beneficial to Utah as it passed through many communities in the state, but only Las Vegas in Nevada.[7]

Utah prevailed and US-50 did not continue to follow the Lincoln Highway to Salt Lake City as Nevada had wanted. The first continuous route of US-50 across eastern Nevada and western Utah was an arch shaped route. US-50 proceeded north from Ely along what is now numbered U.S. Route 93 and Alternate US-93 where the highway would merge with the Victory Highway (U.S. Route 40 along the Wendover Cut-off, since replaced by I-80) to Salt Lake. From there the highway returned to Green River via what is now numbered State Route 201, U.S. Route 89 and U.S. Route 6.[8]

Second iteration[edit]

The second iteration has its origins with the formation of US-6. In 1937,[9] US-6 was extended west from its former terminus at Greeley, Colorado to Long Beach, California. In eastern Utah the route used the existing alignment of US-50. However, in western Utah the route used an unpaved road through Delta reconnecting with US-50 in Ely.[8] By 1954, this route was fully paved and US-50 was moved to this shorter alignment.[10] With this change US-6/50 ran concurrent from Ely to Grand Junction, Colorado.

The paved version did not exactly follow the unpaved roads. The dirt route passed through the numerous mountain ranges of the great basin with the most difficult being Marjum Canyon. The route was relocated to follow the north shore of Sevier Lake, which reduced the number of mountain ranges crossed.[2] Although US-50 was moved to yet another alignment, this route remains US-6 today.

Third iteration[edit]

The modern route of US-50 was created in 1976.[11] This iteration of US-50 has its origins in a dispute over the route of Interstate 70 in Utah. While I-70 was in the planning stage Colorado lobbied for an extension of the original proposal to run across Colorado and into Utah. Utah supported an extension using then US-6/50 to connect Denver, Colorado with Salt Lake City. However, federal planners did not see value in this route and instead supported a route that could be used to connect Denver with Los Angeles, California. I-70 was built using the federally selected route.[12] In 1976, US-50 was changed again to a routing mostly concurrent with I-70. The portion of modern US-50 between Delta and Scipio had been previously numbered State Route 26,[11] and the portion between Scipio and Salina had been numbered State Route 63, with the SR-63 portion being transferred to SR-26 in 1971.

East of Green River I-70 closely follows the original route of US-50, with some minor straightening by Crescent Junction, Cisco, and Westwater.[2]

Major intersections[edit]

County Location[2] mi[13] km Exit Destinations Notes
Millard 0.000 0.000 US 6 / US 50 west Nevada state line
0.665 1.070 SR-159 south – Garrison, Milford
83.897 135.019 SR-257 south – Deseret, Milford
Delta 89.402 143.879 US-6 east – Lynndyl, Salt Lake City East end of overlap with US-6
92.976 149.630 SR-125 east / SR-136 north – Oak City, Lynndyl
107.597 173.161 SR-100 south – Fillmore
Holden 116.497 187.484 SR-64 to I-15 south Former US-91 south
119.723 192.675 178 I-15 south – Fillmore West end of overlap with I-15
129.816 208.919 188 I-15 north – Salt Lake East end of overlap with I-15
Sevier 154.805 249.134 SR-260 south to I-70 west – Aurora
Salina 157.803 253.959 SR-24 east – Aurora
158.527 255.124 US-89 north – Gunnison West end of overlap with I-70 Bus./US-89
160.282 257.949 I-70 west / US-89 south – Richfield East end of overlap with I-70 Bus./US-89; west end of overlap with I-70
190.350 306.339 86 Ivie Creek Rest Area (SR-76) Connects eastbound traffic to SR-72
194.588 313.159 91 SR-10 / SR-72 – Price, Loa
Emery 252.775 406.802 149 SR-24 west – Hanksville
271.501 436.939 157 US-6 west / US-191 north – Price, Salt Lake West end of overlap with US-6/US-191
273.980 440.928 160 I-70 Bus. east / SR-19 – Green River Former route of US-50 east
Grand 278.124 447.597 164 I-70 Bus. west / SR-19 – Green River
285.730 459.838 182 US-191 south – Moab, Crescent Junction East end of overlap with US-191
290.990 468.303 187 Thompson Springs (SR-94)
318.315 512.278 204 SR-128 – Cisco
334.920 539.001 I-70 / US 6 / US 50 east Colorado state line
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ National Highway Planning Network "GIS data version 2005.08" Check |url= value (help). Federal Highway Administration. 
  2. ^ a b c d e f g Utah Road and Recreation Atlas (Map) (2002 ed.). 1:250000. Benchmark Maps. 2002. ISBN 0-929591-74-7. 
  3. ^ Weingroff, Richard F. "Dwight D. Eisenhower System of Interstate and Defense Highways Engineering Marvels". Federal Highway Administration. Retrieved February 15, 2008. 
  4. ^ Brown, Matthew (September 28, 1990). "I-70 Project Reaches End of Road at Last". Deseret News. Salt Lake City, UT. 
  5. ^ "Dinosaur Diamond Prehistoric Highway". Dinosaur Diamond Partnership. Retrieved October 13, 2007. 
  6. ^ United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Cartography by U.S. Geological Survey. Bureau of Public Roads. November 11, 1926. OCLC 32889555. Retrieved November 7, 2013. 
  7. ^ Patrick, Kevin J. & Wilson, Robert E. "15: Lincoln Highway in Utah" (PDF). The Lincoln Highway Resource Guide (PDF). Indiana, PA: Indiana University of Pennsylvania. p. 203. 
  8. ^ a b Road Atlas (Map). Rand McNally. 1946. p. 22. Retrieved June 15, 2008 – via Broer Map Library. 
  9. ^ Official Road Map of Nevada (PDF) (Map). Nevada Department of Highways. 1937. Archived from the original (PDF) on May 12, 2005. 
  10. ^ Official Highway Map of Nevada (PDF) (Map). Nevada Department of Highways. 1954. Archived from the original (PDF) on May 12, 2005. 
  11. ^ a b "Route 26". Utah Department of Transportation. Retrieved December 4, 2007. 
  12. ^ Weingroff, Richard F. "Why Does I-70 End in Cove Fort, Utah?". Ask the Rambler. Federal Highway Administration. Retrieved January 30, 2007. 
  13. ^ "Route Descriptions". Utah Department of Transportation. US-6, US-50 ,I-70. Retrieved March 18, 2008. 

External links[edit]

Route map: Google

KML is from Wikidata
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