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.

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)

DPU BNSF 5636 (AC4400CW) shoves a freight through the 'S' curve as it heads towards Arvada, Colorado.

A lone DPU shoves a triple headed freight towards Arvada, Colorado.

KCS on the Moffat Two Kansas City Southern SD70ACE Belles lead a westbound up the Big Ten curves.....Kanasa City Southern units always add a splash of color to the Moffat Road on there inf... (more)

Nothing but Rock! A gorgeous June morning sees a BNSF manifest clinging to the cliff as it pounds up the 2% grade towards the Continental Divide. David Moffat's dream of a railroad west from Den... (more)

An eastbound SD70AcE leads a coal load past one of the most photograhed spots on the Moffat Road. A new housing development is scheduled to be built on the mountain behind the train, forever litt... (more)

In the evening sunlight, Amtrak's westbound California Zephyr races out of the Denver Metro area and through the signals at East Leyden on May 25th, 2018. The train is running just over 10 hours l... (more)

After waiting a few minutes for MOW crews to clear the tracks down at Rocky Siding, Amtrak's eastbound California Zephyr descends Big Ten Curve and continues east towards Denver on May 25th, 2018.... (more)

UP 5727 leads a oil can train into the Big Ten curve leading to the Rocky Mountains. The steep grade will have the train doubling back on the track cut that can be seen in the background.