BNSF 7933 (ES44C4) heads towards Big Ten Curve after coming out of the Rocky Mountains.

BNSF 7933 (ES44C4) takes the Moffat Line through Arvada, Colorado on its way to Denver.

Train crews and passengers of the California Zephyr that run on the Moffat Line must be curious when they see the horse in the red hazmat outfit. “Cold War Horse” was created to acknowledge the h... (more)

BNSF 1579 (SD40-2) passes through Arvada with a freight destined for Golden, Colorado.

A set of five BNSF locos with a westbound manifest has just crossed Blue Mountain Drive and has made the turn in Coal Creek Canyon to head up the 20‰ grade to Tunnel No 1.

This evening's California Zephyr heading to Chicago meets three UP outbound trains after running through the Colorado Rocky Mountains on the Moffat Line. After the Zephyr passes the trio on its w... (more)

On July 4, 2005 UP put on a show at Big Ten above Denver as its westbound manifest took on the Front Range with no less than eight locomotives including one still in SP paint. Here it is in the lo... (more)

AMTK 52 leads the California Zephyr through the cut under Highway 93 as it leaves Arvada, Colorado.

After running through Big Ten Curve, UP 6049 winds its way towards Denver through Arvada, Colorado. Here we see the mid-train helper engines as they pass beneath Highway 93.

Silence in the snow covered Rocky Mountains is broken up as BNSF's Provo, UT to Denver, CO manifest snakes down Big Ten Curve on UP's Moffat Tunnel Subdivision on January 12th, 2019.

A Denver & Rio Grande Western passenger special hurries westbound through Arvada, Colorado, on the morning of July 11, 1987. Rio Grande EMD GP40-2 No. 3116 and GP40 No. 3136 power the short three-... (more)

Here's something you don't see every day. UP 1507 (GP40M-2) uses the Rocky Siding to pull two hoppers across Highway 93 in Arvada, Colorado. The trio of engines will pass through Big 10 Curve and... (more)

A BNSF trackage rights train drops out of the Front Range at MP 22.6 on Union Pacific's Moffat Tunnel Sub. The hind end DPUs, visible on the distant hillside, are no doubt providing some dynamic ... (more)

An unusual leader on a Union Pacific coal drag, CSXT 3225 brakes its way down the 2 percent into Coal Creek Canyon. Just to the left of the lead motors you can see the swing helpers cut in mid-tra... (more)

BNSF 5755 leads a westbound unit-sand train bound for the expanding oil field facility in Wellington, Utah. The 79 car 11,000+ ton train has the assistance of two DPUs on the rear (SD70ACE+Citra... (more)