Amtrak engine #5 (P42DC) sits at the engine servicing facility as heavy snow falls across Denver and the Colorado Front Range.

The Winter Park Express Ski Train kicks up snow after nearly three feet fell in Coal Creek Canyon, Colorado.

UP 8147 (ES44AC) leads the Grand Junction to Denver train through three feet of snow in Coal Creek Canyon, Colroado.

Snow is falling as UP 1507 (SD40N) crosses Santa Fe Drive in Englewood, Colorado, taking with it a gondola and a bay window caboose.

Snow is falling as Amtrak's California Zephyr and Winter Park Express Ski Train sit on tracks 4 and 5 in Denver's Union Station.

Snow is falling along the Colorado Front Range as BNSF 5282 (Dash9) leads a Ferromex and a freight through Castle Rock, Colorado on the Join Line.

Heavy snow is falling as BNSF 8238 (SD70ACe) passes a helper engine and the old freight depot in Castle Rock, Colorado.

A very frosty BNSF 8348 (ES44C4) runs through Acequia, Colorado on the Join Line as heavy snow falls over the Front Range.

BNSF DPU 9029 (SD70ACe) shoves a loaded coal train through Hudson, Colorado.

The California Zephyr 6 train runs down from Tunnel #1 at Plainview, Colorado.

The California Zephyr runs through Plainview, Colorado on a beautiful morning in the Colorado Rocky Mountains.

Amtrak engine #204 (P42DC) leads the California Zephyr into the Keenesburg Cut at sunrise.

UP 7104 (AC4400CW) exits Tunnel #1 at Plainview, Colorado with a crewman on the front deck.

BNSF 7853 (ES44DC) leads a freight through Castle Rock, Colorado on the Joint Line.

PRLX 4102 (SD40-2) and another unit work the intermodel facility in Hudson, Colorado.