Light snow flurries catch Executive Grinstein BNSF 9709 (SD70MAC) waiting to leave the yard in Golden, Colorado.

BNSF 8945 (SD70ACe) leads a freight through a winter wonderland of heavy snow and thick flock in Golden, Colorado.

BNSF 4034 (Dash9) crosses the Cache La Poudre River in Fort Collins, Colorado.

The BNSF Denver to Provo train makes smoke as the lead ACe muscles the heavy train forward towards the Moffat Tunnel.

Two BNSF trains meet at Tolland, Colorado.

BNSF 8115 (ES44C4) leads a stack train through Spruce, Colorado as it runs south on the Joint Line towards Palmer Lake.

BNSF 8555 (SD70ACe) meets an eastbound coal train that passes at Tolland, Colorado.

Light Snow is falling at the east portal of the Moffat Tunnel as the Amtrak Winter Park Express Ski Train climbs the grade through Tolland, Colorado.

Heavy snow is falling at Plainview, Colorado as the California Zephyr 5 train runs towards Tunnel #2 on the Moffat Tunnel Sub.

Amtrak engine #78 (P42DC) leads the Winter Park Express Ski Train through Rainbow Cut at Plainview, Colorado.

The California Zephyr exits Tunnel #1 at Plainview, Colorado as it heads through fresh snow on the Moffat Tunnel Sub.

BNSF 8945 (SD70ACe) leads a freight out of Golden, Colorado and will head to the massive yard in Denver through falling snow.

BNSF 9295 (SD70ACe) waits in Tolland, Colorado for a UP train to exit the Moffat Tunnel.

UP 1826 (SD40N) works the North Yard in Denver, Colorado.

UP 8995 (SD70AH) muscles an oil can train past a BNSF freight train Tolland, Colorado.