A Union Pacific coal empty works westbound through Clay, Colorado, on the stormy afternoon of June 2, 2007. Big 10 Curve and downtown Denver can be seen above the pair of GE AC4400CW locomotives l... (more)

Union Pacific’s Denver to Salt Lake City manifest freight MNYRO climbs through a snowy Big 10 Curve between Rocky and Clay, Colorado, on February 2, 2014. Four GE AC4400CWs on the point of the fre... (more)

A trio of Union Pacific GE AC4400CWs power a westbound UP coal empty upgrade past the east switch of Clay siding while climbing the two-percent grade around the Big 10 Curve on Colorado’s Moffat T... (more)

Heading west on the old Rio Grande Moffat Tunnel main line, a Burlington Northern Santa Fe manifest freight, led by Santa Fe GE C40-8W No. 846, passes over the east switch of Clay siding climbing ... (more)

Moffat Sand A unit sand train climbs the Big 10 on the Moffat Road. The sand is headed for the oil and gas fields of Western Colorado and Central Utah. The vast basin between the Main Ran... (more)

Blue Looper on the Moffat
Burlington Northern Santa Fe GE C44-9W No. 712 leads an eastbound coal train at Coal Creek Canyon just west of Clay, Colorado, on May 24, 2000. Blue brake shoe... (more)

Santa Fe GE C40-8W No. 846 leads a westbound Burlington Northern Santa Fe manifest freight past the east switch of Clay siding climbing through Colorado’s Big 10 Curve on the afternoon of May 28, ... (more)

Private car “Kansas” carries the markers of the westbound Rio Grande Ski Train through a spring blizzard west of Clay, Colorado, on March 29, 2007.

In a early springtime snowstorm, the Rio Grande Ski Train curves west out of Clay, Colorado, on March 29, 2007.

A pair of Southern Pacific GE AC4400CWs lead an eastbound Union Pacific coal train at mile 22.6 on the Moffat Tunnel Subdivision between Plainview and Clay, Colorado, on December 1, 2002. The trai... (more)

A trio of Union Pacific GE AC4400CW locomotives lead a coal empty upgrade through Clay, Colorado, on the afternoon of May 23, 2000.

Two SD40-2 locomotives serving as a rear manned helper push on a westbound Burlington Northern Santa Fe freight departing Clay, Colorado, on the afternoon of July 13, 2002. This train just met a U... (more)

A westbound Burlington Northern Santa Fe freight departs Clay siding on Colorado’s Moffat Tunnel Subdivision. It has just met an eastbound Union Pacific coal train that can barely be seen going th... (more)

So who else (at least 7 others) was there this Jan 8, 1984 day as DRGW 5771 leads the Ski Train between Clay and Plainview, about to enter Tunnel 1.

With early morning light, DRGW 5357 leads eastbound train #742 at Clay, CO, on Feb 4, 1984.