Utah State Route 42

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State Route 42

Route information
Defined by Utah Code §72-4-110
Maintained by UDOT
Length7.390 mi[1] (11.893 km)
Existed1912 as a state highway; 1927 as SR-42–present
Major junctions
West endIdaho state line near Malta, ID
East end SR-30 Curlew Junction
CountryUnited States
Highway system
  • Utah State Highway System
US 40 SR-43

State Route 42 (SR-42) is a 7.390-mile-long (11.893 km) state highway completely within Box Elder County in the U.S. state of Utah. It connects SR-30 to former SH-81 at the Idaho state line. The highway was formerly part of U.S. Route 30S (US-30S), prior to being bypassed and replaced with what is now signed as Interstate 84 (I-84).

Route description

State Route 42 begins at the Idaho state line, connecting to Malta, Idaho via a Cassia County road. From its western terminus, SR-42 travels southeast through Kelton Pass,[2] a gap between the Raft River Mountains to the southwest and the Black Pine Mountains to the northeast. The highway eventually reaches the ghost town of Cedar Creek, where it turns to the east-southeast. It continues in this manner until its eastern terminus at SR-30, known as Curlew Junction.[3]


The road from SR-17 (now SR-82) in Tremonton northwest to Snowville became a state highway in 1912 as part of the Midland Trail (which continued to Nevada via present SR-30.[4] The state highway was extended to Idaho in 1921,[5] became part of US 30S in 1926,[6] and received the (unsigned) SR-42 designation in 1927.[7] The route was extended slightly east from Tremonton to SR-41 (now SR-13) in 1945, taking over what had been part of SR-82.[8] When SR-3 was assigned to proposed I-80N in 1962, SR-42 east of the Snowville junction (exit 7) became SR-3. (Later, the portion near Tremonton would be renumbered SR-102.) Finally, in 1969, SR-42 received its present termini, as SR-70 (now SR-30) was extended east over SR-42 to I-84 west of Snowville, and the roadway through Snowville was removed from the state highway system.[5] The American Association of State Highway Officials approved the relocation of US-30S onto I-84 in 1970, after which the first SR-42 signs were placed on the route that had been so designated since 1927.[9]

Major intersections

The entire route is in Box Elder County. [10]

0.0000.000Utah/Idaho state line; western terminus
Curlew Junction7.39011.893 SR-30 – Park Valley, SnowvilleEastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi

==See also==


  1. ^ a b "Highway Reference Online - SR-42". Utah Department of Transportation.
  2. ^ U.S. Geological Survey Geographic Names Information System: Kelton Pass
  3. ^ Google (July 24, 2019). "Overview of SR-42" (Map). Google Maps. Google. Retrieved July 24, 2019.
  4. ^ Third Biennial Report of the State Road Commission, 1915, p. 65: "In May, 1912, a road to pass west from Snowville through Park Valley, Rosette and Lucin to the Utah-Nevada line was designated as a State Road. At the following session of the State Legislature, an appropriation of $15000 was made to help in the construction of this road. This appropriation was part of the "Midland Trail" building fund, the Midland Trail being a proposed highway entering the State through Grand County on the east, thence through Emery, Carbon, Utah, Salt Lake, Davis, Weber and thence west through Box Elder County around the north end of Great Salt Lake."
  5. ^ a b "State Road Resolutions SR-42.pdf". Utah Department of Transportation. Archived February 25, 2007, at the Wayback Machine, accessed July 2007
  6. ^ Bureau of Public Roads & American Association of State Highway Officials (November 11, 1926). United States System of Highways Adopted for Uniform Marking by the American Association of State Highway Officials (Map). 1:7,000,000. Washington, DC: United States Geological Survey. OCLC 32889555. Retrieved November 7, 2013 – via Wikimedia Commons.
  7. ^ Utah State Legislature (1927). "Chapter 21: Designation of State Roads". Session Laws of Utah. 42. From Tremonton northwesterly via Snowville to the Utah-Idaho State line near Strevell, Idaho.
  8. ^ Utah State Legislature (1945). "Chapter 61: State Roads and Routes". Session Laws of Utah. Route 42. From Haws Corner on SR-41 northwesterly via Tremonton and Snowville to the Utah-Idaho state line near Strevell, Idaho.
  9. ^ "State Road Resolutions SR-30.pdf". Utah Department of Transportation. (5.31 MB), updated October 2007, accessed May 2008
  10. ^ "State Highway Map". Utah Department of Transportation. Retrieved 22 April 2008.

External links

Media related to Utah State Route 42 at Wikimedia Commons