Although this is called a Chicago-Denver timetable, only three of the six trains shown actually went to Denver: the Denver Zephyr, the California Zephyr, and mail train 7 & 8. Also shown were the Nebraska Zephyr and Ak-Sar-Ben Zephyr to Lincoln and the Kansas City Zephyr, which went to Kansas City but only the portion to Galesburg is shown.
Click image to download an 592-KB PDF of this timetable.
The timetable includes two different schedules for the Denver Zephyr, one that was in effect for June through August and the other for September through May. The trains left Denver and Chicago at the same time under both schedules, but the summer trains ended in Chicago and Denver about 10 minutes behind the non-summer trains. As one Streamliner Memories reader suggested when I posted the June 1967 system timetable, this may have been to allow the train to stop twice — once for coaches, once for sleepers — in some cities when the train was too long to fit in station platforms.