A nice scenic ride south of Billings through rolling hills, badlands, and cliff sides. Several sections have nice high speed linked curves. Near Lockwood the road gets really twisty. The Pryor Xavier highway is actually locally labelled as Highway 91. Going south from Billings there is no gas until you reach Hardin.
Lots of nice curves, a few switchbacks, some cattle guards between Pryor and St. Xavier. Roads are overall pretty good.