The California Zephyr through Tolland, Colorado as it heads to the Moffat Tunnel and the Rocky Mountains.

Amtrak engine #163 (P42DC) leads the California Zephyr through the corner at Tolland, Colorado.

Amtrak's Viewliner Inspection Car #10004 gives Amtrak CEO Stephen Gardner and team a great view of Plainview, Colorado and the Boulder Flatirons beyond as the "American View" car runs on... (more)

UP 8006 (ES44AC) leads a power-heavy freight south on the Greeley Sub through Brighton, Colorado. Warm weather has melted the recent snow, providing a reflecting mud puddle alongside the track.

BNSF 6014 (ES44AC) runs south on the Joint Line through Monument, Colorado and towards a patch of recently repaired rail.

The California Zephyr runs past a frozen South Boulder Creek as it heads towards the Moffat Tunnel and Tolland, Colorado.

BNSF 7853 (ES44DC) leads a freight past the rock formations at Palmer Lake, Colorado.

UP 8834 (SD70AH) runs through Coal Creek Canyon as two mid-helper engines in the background run down the hill in the from Tunnel #1.

UP 8834 (SD70AH) leads an oil can train through the turn at Crescent, Colorado on a sunny and windy day.

A line of heavies are getting serviced at the fuel and sand stations while light power works on sorting cars in the massive North Yard in Denver, Colorado.

BNSF 9295 (SD70ACe) leads a freight through Tolland, Colorado as it heads towards the Moffat Tunnel.

A KCS ES44AC leads a grain train south on the Joint Line through Castle Rock, Colorado.

A KCS Southern Bell leads a hopper train south on the Joint Line through Monument, Colorado.

Amtrak #30 (P42DC) leads the Winter Park Express into the S curve at Coal Creek Canyon.

AMTK 158 (P42DC) kicks up the snow in an orange glow of the sunrise as it runs through Keenesburg, Colorado on the Brush Sub.