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)

The California Zephyr's morning #5 train out of Denver runs towards Big Ten Curve as it heads into the foothills of the Colorado Rocky Mountains. It will climb in elevation and double back on the... (more)

Amtrak engine 69 leads the California Zephyr through Little Ten Curve and will soon enter Big Ten Curve as it gains elevation climbing into the foothills of the Colorado Rocky Mountains.

Blue Mountain Magic

Spring thunderstorms batter the high plains with a characteristic clearing along the Flatiron Range near Coal Creek.

Amtrak engine 23 (P42DC) leads the California Zephyr #6 out of Tunnel 29 during an intense snow storm and continues its decent down the Colorado Rocky Mountains while heading to Denver.

Threading Through the Gold

Fall color glows in the valley at Tolland which plays host to an empty coal bucket moving west swiftly towards the Great Divide.

In the Gun Barrel

BNSF 8383 is down grade at east Tolland under the Giants Ladder of the original Rollins Pass line with heavy sand for the robust fracking business along... (more)

The arrival of the evening's #6 California Zephyr in the Colorado Rocky Mountains coincided with the beginning of a strong winter snow storm. Here Amtrak engine 23 (P42DC) runs through heavy snow... (more)

The #5 California Zephyr has left Denver in the morning and runs through Coal Creek Canyon with three power units, perhaps in anticipation of the snowstorm that is suppose to hit later in the day.... (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)

Amtrak’s westbound California Zephyr curves through Tunnel 40 as seen from the rim of Little Gore Canyon between Azure and Radium, Colorado, on August 21, 2014.

An eastbound Union Pacific coal train, led by Chicago & North Western AC4400CW No. 8818, drops down the two-percent grade out of Tunnel 15 and is about to enter Tunnel 14, near Crescent, Colorado,... (more)

BNSF 4228 (ES44C4) leads a freight through Tolland, Colorado and will soon be entering the 6 mile long Moffat Tunnel on its way to the western side of the Continental Divide.

This shot shows the steep grade from Coal Creek Canyon up to Tunnel #1. BNSF 4228 (ES44C4) leads a four headed freight up the hill as llamas graze in the pasture below.

BNSF 7016 (ES44C4) exits Tunnel #1 and heads down grade towards Coal Creek Canyon.