A shortened westbound California Zephyr (only six Superliners instead of the typical seven) heads west through Barbara's Gulch. In peak passenger seasons, the Zephyr will run with nine Superliners. Eight tends to be the average. During the slow passenger season (typically winter), you'll usually find seven Superliners on the train. It has been said that Amtrak is taking advantage of the slow season to repair and/or refurbish some of the Superliners, hence only six on the train right now.
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