BNSF 8115 (ES44C4) snakes a stack train south on the Joint Line through Spruce, Colorado.

BNSF 8115 (ES44C4) leads a stack train southbound on the Joint Line at Greenland, Colorado.

BNSF 2604 (GP39-3) works the terminal in Hudson, Colorado.

BNSF 4034 (Dash9) leads a freight through Fort Collins, Colorado on the Front Range Sub.

BNSF Executive Grinstein #9709 leads the Coors Beer Train as it runs to the Denver Yard.

BNSF Executive Grinstein #9709 leads the Coors Beer Train back into Denver from Golden, Colorado.

BNSF 1653 (SD40-2) runs light in the snow in Golden, Colorado.

Snow is falling on the Colorado Railroad Museum's Rio Grande Southern Galloping Goose #7 as it sits next to the Rio Grande GP30 that was recently restored.

The snow is falling at such a heavy rate that UP 8051 (ES44AC) has to use its pilot to plow the snow off the tracks.

UP 8051 (ES44AC) exits the east portal of the Moffat Tunnel into a heavy snowstorm that is blanketing the valley in nearly two feet of snow.

UP 801 (GP38-2) works the ladders in the North Yard in Denver, Colorado.

UP 1507 (GP40M) moves through the Union Pacific's North Yard in Denver, Colorado.

Its Throwback Thursday at the BNSF Engine Servicing Center in Denver, Colorado as two Executive Grinstein MACs and a Cascade Green Burlington Northern unit wait for servicing.

A BNSF stack train runs over the Santa Fe Bridge in Larkspur, Colorado.

BNSF 8115 (ES44C4) leads a stack train south on the Joint Line through Castle Rock, Colorado.