The television series of Gunsmoke ran from 1955 to 1975 and is said to be one of the longest running prime-time shows on television. There were 635 episodes and many of the outdoor scenes for this show were shot in Johnson Canyon near Kanab, Utah. The setting of Gunsmoke is Dodge City, Kansas during the 1870’s.
The old Gunsmoke film set, located about five miles from the US89 turnoff on Johnson Canyon Rd. Look for it on the right as you head out from Kanab.
The set is on private property but can be viewed from the road. Johnson Canyon/Skutumpah Road can be reached from Glendale by heading east on Glendale Bench Road, or from Kanab via US89.
Unfortunately when I checked the site out in July 2018, the old film set hasn’t been maintained and is crumbling away. It’s a shame as the nearby Little Hollywood museum in Kanab probably would have loved to have some of the buildings.
More info about the site: http://www.movielocationsplus.com/JOHNSON.HTM