UP 4404 (SD70M) heads into storm light as storms east of Aurora, Colorado drop inches of rain.

RTD commuter train 4049 (Hyundai P3 Eagle) runs past the BNSF engine servicing yard in downtown Denver, Colorado.

Loram LMIX 417 gets ready to leave the engine servicing yard in Denver, Colorado.

AMTK 136 (P42DC) leads the California Zephyr up towards Tunnel 1 at Plainview, Colorado.

UP 4404 (SD70M) leads the special heritage car train into Aurora, Colorado on its way to Denver.

BNSF 2854 (GP39-2) runs light as it rounds the corner leading to Broomfield, Colorado.

BNSF 6325 (ES44AC) brings an empty coal train into downtown Denver, Colorado, passing Empower Field where the Denver Broncos play.

A UP visitor and a Cascade Green former Burlington Northern engine join BNSF 8027 (ES44C4) and the Denver engine servicing facility.

BNSF 4327 (Dash9) leads a freight and a pair of DPU's down the hill from Tunnel 1 and into Coal Creek Canyon.

The California Zephyr runs through fresh snow as it climbs towards Tunnel 1 out of Coal Creek Canyon.

Snow is falling in the Union Pacific's North Yard as UP 1957 (SD40N) heads towards a cut of cars that need sorting.

UP 5518 (C45ACCTE) lends a helping hand to the California Zephyr as it runs through the Keenesburg Cut on its way to Chicago. The UP motor was needed because one of the Amtrak P42s had to be set ... (more)

The California Zephyr 6 train made a rare daylight appearance at Rollinsville, Colorado, due to being 13 hours late. The train lost a P42 engine and was able to enlist the services of a Union Pac... (more)

The stylish and colorful Rocky Mountaineer passenger train exits the west portal of the Moffat Tunnel at Winter Park, Colorado as it makes a training run prior to the start of the season's tours. ... (more)

UP 5340 (ES44AC) leads three other motors and a freight through a snowy Winter Park, Colorado.