In 1966, GN replaced its long-running blue timetable cover with this beautiful photograph of the Empire Builder along the south boundary of Glacier National Park. Note that the locomotives are painted in the pre-1962 colors rather than the later simplified scheme, suggesting this was an older photo. GN timetables were made of better paper than the newsprint used for timetables by some other railroads (ahem, NP, UP, Milw), yet the photo covers of the 1966 timetables, especially the clouds in the sky, had a regrettable tendency to turn yellow. Inside, the major design change was to use blue ink instead of black.
Substantively, the three local trains that survived to the 1962 timetable are now gone. Day train 3 & 4 from St. Paul to Minot have been renamed the Dakotan, a name formerly used for an overnight train, numbers 9 & 10, that served the same route until 1962. Train 3 & 4 from Havre to Shelby via Great Falls has been cut back to Havre to Great Falls, with the Shelby portion now relying on a bus. Otherwise, there are no other major changes from the 1962 timetable.