Montana: land of hicks, ticks, and a few California refugees like our missing friend PDXrailtranspo.
"A Northern Pacific train cruised on tracks curving down hillside in series of switchbacks
on Aug. 23, 1895. Photography Frank Haynes' Palace Car is last car of train. This was taken by Haynes two miles south of Jefferson City, Montana, in the Boulder valley. This was part of the Helena, Boulder Valley, & Butte Railroad Track." - MT Hist. Soc.
Not "switchbacks" in the railroad sense. Pretty damn steep grade.