The DPUs on Union Pacific's MNYRO manifest brings up the rear of the train as they depart the siding at Tolland, Colo., after letting the Ski Train by. It's only a couple of miles until the Moffat... (more)

Amtrak's westbound Ski Train races west with AMTK P42DC no. 42, out of the greater Denver Metro Area west of Arvada, Colo., just after sunrise on Mar. 14. 2015.

BNSF ES44AC no. 6089 leads another ES44AC on the first of two coal empties at Berthoud, Colo., just after sunrise on April 01, 2015.

A handful of clouds build up over the mountains as BNSF's Cheyenne, Wyo., to Denver, Colo., manifest heads south out of Boulder led by three GEVO's and two dead-in-tow Hudson Bay Railway GP35's, n... (more)

After meeting a southbound manifest at Broomfield, this northbound empty coal train picks up some speed as the train heads north towards Cheyenne and eventually Powder River.

The crew on UP 5727 west perform a roll-by inspection on the westbound Roper Yard manifest as they depart Tolland, Colo., and head towards the Moffat Tunnel on March 14, 2015.

The first of two coal empties comes to a stop at the north end of Broomfield, Colo., as a southbound manifest led by BNSF C44-9W no. 780 slowly makes its way through the siding at Burns Junction.

BNSF C44-9W no. 5337 along with a UP C40-8 and BNSF ES44C4 have just exited Tunnel #1 as they begin their descent down the 2% grade in Coal Creek Canyon on the Provo to Denver manifest.

Just before sunrise, a westbound empty crude oil train makes its way out of Barbara's Gulch and heads into the siding at Rocky. The train will let the Ski Train by before continuing up the mountai... (more)

Just before sunrise, a westbound empty crude oil train makes its way through Barbara's Gulch on the approach to Rocky. The train will take the siding here and let the Ski Train by before continuin... (more)

Elk graze on vegetation in the open space as the westbound Ski Train led by Amtrak's "Veterans Unit" no. 42 rolls right on through Eisele heading west to the ski resort in Winter Park.

It's just after sunrise as the westbound Ski Train races west through Chemical, Colo., with Amtrak P42DC no. 42, the Veterans unit, on point. Downtown Denver can be seen to the right of the train.... (more)

After getting the light to pull down the main at Tolland, UP 5727 slowly pulls west where they'll pick up the conductor on the manifest parked ahead in the siding next to the DPUs and bring him ba... (more)

Beginning of a new era? Amtrak's westbound Ski Train races through Tolland, Colo., while overtaking a westbound Union Pacific manifest that's parked in the siding. This is pretty much a dem... (more)

A thin layer of clouds mixed in with haze partially block out the sun as Amtrak no. 6, The California Zephyr, coasts down the grade at track speed near Arvada, Colo., with a brand new Siemens ACS-... (more)