U.S. Route 50 in Utah

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.

U.S. Route 50 marker

U.S. Route 50
US 50 highlighted in red
Route information
Defined by Utah Code §72-4-110
Maintained by UDOT
Length334.920 mi[1] (539.001 km)
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)
CountiesMillard, Sevier, Emery, Grand
Highway system
  • State highways in Utah

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 descriptionEdit

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 King’s Canyon, and House Range via Skull Rock Pass, before arriving at the shore of Sevier Lake, an intermittent lake 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]

The entire route through the state, as well as the concurrencies with I-15 and I-70, is included in the National Highway System.[6]



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

First iterationEdit

In 1926, when the U.S. Highway system was first announced, there was a gap in US-50 between Ely and Thistle.[7] 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.[8]

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.[9]

Second iterationEdit

The second iteration has its origins with the formation of US-6. In 1937,[10] 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.[9] By 1954, this route was fully paved and US-50 was moved to this shorter alignment; the older US-50 alignment was designated as U.S. Route 50 Alternate.[11] 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 using Marjum canyon and Marjum Pass to and through the Tule Valley. Once paved, 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 iterationEdit

The modern route of US-50 was created in 1976.[12] 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.[13] 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,[12] 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 intersectionsEdit

Mileposts reset at the I-70 junction, to reflect I-70 mileage.[14]

Millard0.0000.000   US 6 / US 50 west – ElyContinuation into Nevada
0.6651.070  SR-159 south – Garrison, Milford
83.897135.019  SR-257 south – Deseret, Milford
Delta88.302142.10850 North / 500 WestInterchange; westbound exit and eastbound entrance
89.402143.879  US-6 east – Salt Lake CityEast end of overlap with US-6
92.976149.630   SR-125 east / SR-136 north – Oak City, Lynndyl
107.597173.161  SR-100 south – Fillmore
Holden116.497187.484   SR-64 to I-15 southFormer US-91 south
119.723192.675  I-15 southWest end of overlap with I-15; exit 178 on I-15
125.031201.218184Tower RoadExit number follows I-15; signed as "Ranch Exit" until 2015
129.816208.919  I-15 north – Salt Lake CityEast end of overlap with I-15; exit 188 on I-15
Sevier154.805249.134   SR-260 south to I-70 west – Aurora
Salina157.803253.959  SR-24 east – Aurora
158.527255.124  I-70 Bus. begins / US-89 north (State Street north) – Gunnison, Salt Lake CityWest end of overlap with I-70 Bus./US-89
    I-70 Bus. ends / I-70 west / US-89 south – RichfieldEast end of overlap with I-70 Bus./US-89; west end of overlap with I-70; exit 56 on I-70
63.193101.69963Gooseberry Road
73.924118.96973Ranch exit
86.773139.64886Ivie Creek rest areaAccess via SR-76
91.011146.46891   SR-10 north / SR-72 south – Price, Loa
Emery99.488160.11099Ranch exit
104.620168.370Salt Wash view area (westbound)
Sand Beach view area (eastbound)
108.011173.827108Ranch exit
115.634186.095Devil's Canyon view area (eastbound)
116.513187.509116MooreEagle Canyon view area also signed westbound
122.566197.251Ghost Rocks view area
131.507211.640131Ranch exit
142.585229.468Spotted Wolf Canyon view area
146.337235.507San Rafael Reef view area (westbound)
149.198240.111149  SR-24 west – Hanksville
157.924254.154157   US-6 west / US-191 north – Price, Salt Lake CityWest end of US-6/191 overlap
160.403258.144160   I-70 Bus. / SR-19 east – Green RiverI-70 Bus. not signed westbound
Grand164.547264.813164   I-70 Bus. / SR-19 west – Green RiverI-70 Bus. not signed eastbound
Crescent Junction182.153293.147182  US-191 south – Crescent Junction, MoabEast end of US-191 overlap; former US-160 east
187.413301.612187Thompson Springs (SR-94)
189.876305.576Rest area / Visitors Center (westbound)
204.738329.494204  SR-128 south – Cisco
214.367344.990214Danish Flat
228.352367.497Harley Dome view area (westbound)
231.673372.842  I-70 east (US 6 / US 50 east)Continuation into Colorado
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ "GIS data version 2005.08". 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. Archived from the original on September 18, 2007. Retrieved October 13, 2007.
  6. ^ "Utah National Highway System". UDOT Data Portal. Retrieved February 21, 2019.
  7. ^ 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.
  8. ^ Patrick, Kevin J. & Wilson, Robert E. "15: Lincoln Highway in Utah" (PDF). The Lincoln Highway Resource Guide. Indiana, PA: Indiana University of Pennsylvania. p. 203.
  9. ^ a b Road Atlas (Map). Rand McNally. 1946. p. 22. Retrieved June 15, 2008 – via Broer Map Library.
  10. ^ Official Road Map of Nevada (PDF) (Map). Nevada Department of Highways. 1937. Archived from the original (PDF) on May 12, 2005.
  11. ^ Official Highway Map of Nevada (PDF) (Map). Nevada Department of Highways. 1954. Archived from the original (PDF) on May 12, 2005.
  12. ^ a b "Route 26". Utah Department of Transportation. Retrieved December 4, 2007.
  13. ^ Weingroff, Richard F. "Why Does I-70 End in Cove Fort, Utah?". Ask the Rambler. Federal Highway Administration. Retrieved January 30, 2007.
  14. ^ a b "Route Descriptions". Utah Department of Transportation. US-6, US-50 ,I-70. Retrieved March 18, 2008.

External linksEdit

Route map:

KML is from Wikidata
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