Amtrak's San Francisco Zephyr had GP40X 9003. Amtrak F40PH 234 on Pioneer. DRGW was still operating the Rio Grande Zephyr in Colorado to SLC, but only for a few more days.
UP assigned GP40X units to Amtrak's San Francisco Zephyr between Ogden, UT, and Denver, CO, across Wyoming. A few days later Amtrak would reroute the train through Colorado renaming it the Califor... (more)