The Monte Cristo and Big Mountain highways are scheduled to close for the winter Monday morning.
Utah Department of Transportation crews will close Monte Cristo Highway, also known as State Route 39, between milepost 37 east of Huntsville and milepost 56 near Woodruff. It won't reopen until late May.
The Big Mountain Highway, SR 65, will be closed at 12:01 a.m. between milepost 24, south of East Canyon Resort, and milepost 3, near the Emigration Canyon Road turnoff in Salt Lake County.
These roads are shut down in the winter because of safety concerns and the prohibitive cost of keeping them open, UDOT says.
UDOT already has closed other seasonal roads, including Guardsman Pass, SR 190, between Big Cottonwood Canyon and Park City; the American Fork/Alpine Loop, SR 92, between milepost 14 and 22.5; and the Mt. Holly Junction Road, SR 153.