Utah State Route 142

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State Route 142 marker

State Route 142
Route information
Defined by Utah Code §72-4-120
Maintained by UDOT
Length: 17.353 mi[2] (27.927 km)
Existed: 1933[1] – present
Major junctions
South end: SR-23 in Newton
East end: US-91 in Richmond
Highway system
  • State highways in Utah
SR-141 SR-143

State Route 142 (SR-142) is a state highway in the U.S. state of Utah. At 17.3 miles (27.8 km) long, it connects the towns of Newton, Clarkston, Trenton, and Richmond to US-91 and SR-23 in northern Cache County.

Route description[edit]

The route starts at its intersection with SR-23 in Newton and travels about 5 miles (8.0 km) miles northwest to Clarkston. Here the route turns east and travels just over 12 miles (19 km) through Trenton and ends in Richmond at the intersection with US-91.


The state legislature created State Route 142 in 1933, connecting SR-69 (now SR-30) at Petersboro with Newton and Smithfield.[1] SR-142 was moved to the present route of Newton to Clarkston at SR-170 in 1941, with the old alignment through downtown Newton to Smithfield becoming SR-218.[3]

In 1969, SR-170, which ran from Clarkston via Trenton to Richmond was absorbed into SR-142, and SR-170 was deleted. This completed the current route of SR-142 as it runs today.

Major intersections[edit]

The entire route is in Cache County.

Location mi[2] km Destinations Notes
Newton 0.000 0.000 SR-23 Southern terminus
Trenton 9.779 15.738 SR-23
Richmond 17.353 27.927 US-91 Eastern terminus
1.000 mi = 1.609 km; 1.000 km = 0.621 mi


  1. ^ a b Utah State Legislature (1933). Chapter 30. Session Laws of Utah. (142) From route 69 at Peterboro north to Newton thence easterly to Smithfield. 
  2. ^ a b "State Route 142 Highway reference" (PDF). Utah Department of Transportation. May 2008. Retrieved 2009-08-13. 
  3. ^ Utah State Legislature (1941). Chapter 34. Session Laws of Utah. Route 142. From route 69 at Peterboro north via Newton and Clarkston to the Clarkston cemetery." "Route 218. From route 142 in Newton easterly to route 1 in Smithfield.