The Westbound Zephyr glides downhill parallel to the Colorado River about two miles west of the siding of Dell. It's another nine miles (roughly) to the next siding of Range. Even though the Dotsero Cutoff is nearly 36 miles long, there are only two sidings in that stretch! To use an east slope analogy, that is like going from North Yard to Rollins with only two sidings!
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