Main routes generally still existed in 1976.
Cody Bus Lines - operated 1960-1994
Original route: Deaver-Cody
(acquired from Trailways)
Jackson Rock Springs Stages - operated 1949-1992
Original route: Jackson-Rock Springs
Route was originally Trailways
Trailways member 1949-1959
Star Valley Jackson Stages - operated until 1981 (to Teton Stage Lines)
Original route: Idaho Falls-Afton
Powder River Transportation - operated 1982-2007 (to Black Hills Stages)
Original route: Gillette-Casper
1982-1983 was Frontier Stages
Trailways member (Powder River Trailways) 1994-1997
Black Hills Stage Lines remains in existence
Bus companies generally listed in the July 1942 Russell's Guide or the 1952 Mass Transportation's Directory, and their predecessor and successor companies. This list is somewhat arbitrary and provides a general overview.
Prairie Motorways - operated until 1961
Original route: Casper-Lusk-Crawford NE
Prior to 1943 was Pathfinder Transit Lines
1943-1947 service suspended
Rains Transportation Co. - operated until 1947
Original route: Jackson-Rock Springs/Evanston-Big Piney
Salt Creek Freightways - operated until 1963 (to Continental Trailways)
Original route: Casper-Sheridan
Scenic Stages - operated 1946-1950
Original route: Afton-Montpelier ID
1946-1948 was Haderlie Bus Line
Wind River Stages - operated 1949-1954
Original route: Riverton-Jackson
Wyoming Motorway - operated until 1975
Original route: Casper-Rawlins
1968-1975 was Pioneer Transit Lines