Union Pacific's annual Cheyenne Frontier Days train lays over at Union Station in Denver on July 16, 1998.

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Rio Grande's Railblazer piggyback train heads west out of Denver near Leyden, Colorado on a hot July 9, 1989.

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A westbound BNSF freight with SD40-2 pushers crosses Blue Mountain Drive at the mouth of Coal Creek Canyon on October 23, 2001. Climbing toward Tunnel 1 in the background is the head end of the train with three GE Dash 9s.

Tags:   UP Moffat Tunnel Sub BNSF pushers Coal Creek Canyon Tunnel 1 Colorado Moffat Sub CO train railroad freight SD40-2

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In April 1984, a westbound Rio Grande freight encounters a high country ground blizzard at East Portal, Colorado.

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On May 29, 2011, Amtrak No. 6, the California Zephyr, cruises through Clay, Colorado, as a westbound UP coal empty waits patiently at Rocky siding below.

Tags:   UP Moffat Tunnel Sub Amtrak California Zephyr Clay Rocky Colorado train No. 6 plains CZ CO train railroad passenger train unit train coal train UP Union Pacific

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