Running about 45 minutes late, the westbound Zephyr is approaching the east portal of the Moffat Tunnel. Here, at East Portal, the tracks run parallel to South Boulder Creek. The water for which is primarily sourced from the west slope after coming through the Moffat Water Tunnel. We are right around 9,200 feet above sea level, the highest point on Amtrak's system, and the highest active point on Class 1 railroads.
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