State Route 150, also known as the Mirror Lake Highway, is a state highway in the U.S. state of Utah. It is named for Mirror Lake, a picturesque lake that the highway passes along the way. It is also a USDA Forest Service Scenic Byway.^[3]

Quick Facts State Route 150, Route information ...

State Route 150
Mirror Lake Highway
SR 150 highlighted in red
Route information
Maintained by UDOT
Length	54.742 mi[1] (88.099 km)
Existed	1933–present
Restrictions	Closed in winter from mile 14.6 to 48.6[2]
Major junctions
West end	SR-32 in Kamas
North end	WYO 150 near Evanston, WY
Location
Country	United States
State	Utah
Highway system
Utah State Highway System Interstate US State Minor Scenic
← SR-149 → SR-151

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The highway begins at the intersection of Main Street (SR-32) and Center Street in Kamas and heads east on the latter as a two-lane undivided highway. Once exiting Kamas, the route dips southeast and continues as such until reaching Samak, where the road turns northeast briefly. Soon after, the highway turns south and southeast again. After continuing in a general southeast direction, the highway turns northeast and north and continues as such until reaching the Wyoming border south of Evanston.^[4]

The road is the highest paved road in Utah when it crosses Bald Mountain Pass at an altitude of 10,715 ft (3,266 m).^[5]

During the winter months the road is closed to automobiles and is used by snowmobiles.

The state legislature designated SR-150 in 1933, running east from SR-35 (now SR-32) in Kamas to the Wasatch-Cache National Forest boundary.^[6] In 1953, it was extended east and north via Mirror Lake to the Wyoming state line.^[7]