SSRX 1393 (MP15AC) works the Budweiser brewing plant in Fort Collins, Colorado.

UP 5382 (ES44AC) begins the climb through Big Ten Curve which will help the train achieve a constant 2% grade in elevation.

UP 1826 (SD40N) heads into the Union Pacific North Yard to shuffle freight cars.

BNSF 3868 (ET44C4) shoves a freight through the curve at Crescent, Colorado. There was a high wind warning this day as evidenced by the whipping of the tops of the Rocky Mountains

The California Zephyr 6 train running east arrives at Glenwood Springs and will soon park briefly at the depot to drop off and pick up passengers.

The two lead motors of the California Zephyr reach the sunshine as fog clouds coat to tops of the foothills in Coal Creek Canyon, Colorado.

AMTK heritage engine 130 (P42DC in Phase II paint scheme) leads the California Zephyr through Keenesburg, Colorado at sunrise.

UP 4199 (SD70M) leads the Rocky Mountain Express towards Tolland, Colorado on the second test run of the season to Moab, Utah.

BNSF 2828 (GP39-2M) sits on the 'time out' track at the BNSF engine servicing facility in Denver, Colorado.

BNSF 8281 (ES44C4) arrives with a freight in Denver on the Front Range Sub.

BNSF 7417 (ES44DC) leads a Warbonnet and a Heritage I unit through Coal Creek Canyon as it begins the journey up the Moffat Tunnel Sub.

BNSF 7869 (ES44DC) waits for a passing westbound BNSF freight and then will proceed eastbound down the mountain on the Moffat Tunnel Sub.

The fog clouds are moving into Coal Creek Canyon just as the California Zephyr arrives on its way up the Moffat Tunnel Sub.

The sun peaks above the clouds just as the California Zephyr runs through Roggen, Colorado on its way to Denver on the Brush Sub.

BNSF 8281 (ES44C4) runs the ridge in Westminster, Colorado as it heads to Denver on the Front Range Sub.