Utah's Scenic Byways by Dan Wright Much of Utah's most well known desert scenery is in the southern third of the state, while the population centers of Ogden, Salt Lake City, and Provo are in the north. The western terminus of I-70 is at Interstate 15 about halfway between Provo and Cedar City. Interstate 15 leads to Las Vegas, Nevada, and on through to Los Angeles as one travels south, while Butte, Montana is on its northern end. Utah Scenic Byways Utah has 27 officially named Scenic Byways, so-named because of their appeal to travelers. The Scenic Byways are major roads that are paved and regularly traveled.
Some routes feature sharp curves and steep grades.
Travel speed is less than 55 miles per hour in some areas. One of the most traveled is the set of byways of the Colorado Riverway near Moab. The Riverway also includes Kane Creek Road from Moab Valley to the state land south of Hunter Canyon. The Highway 128 Scenic Byway extends from I-70 to Highway US 191. The route is 43 miles and can be driven in about one hour.