The southern portion of SR-222 was initially designated as
Utah State Route 224 in 1941, running from
SR-113 in
Midway north to Schneitter's Hot Pots, now the Homestead Resort. In 1953, the route was extended north to the boundary of
Wasatch Mountain State Park. This extent of SR-224 is what now comprises SR-222. Incidentally, SR-224 was extended again in 1963 farther north over
Empire Pass to
Park City, and yet again in 1969 north all the way to
I-80 at
Kimball Junction. In 1990, the state and
Wasatch County executed a trade, wherein
SR-32 around the south side of the
Jordanelle Reservoir was restored to the state highway system (it had carried
U.S. 189 until the reservoir forced its relocation), and portions of
SR-190,
SR-220, and SR-224 became county roads. In particular, SR-224 was removed from the state highway system between the Pine Creek Campground (near the state park boundary) and the Wasatch/
Summit county line. The unconnected southern portion between SR-113 and the campground, however, remained part of SR-224 until 2004, when it was redesignated as SR-222 to eliminate confusion. ==Major intersections==