The day's last minutes of sun catch UP 4528 (SD70M) lashing up to a cut of cars in the yard at LaSalle, Colorado.
Snow is whipping as a fast eastbound coal train with BNSF 6209 (ES44AC) races past a westbound coal train at Barr Lake, Colorado.
Sunrise is replacing the blue hour as BNSF 3664 (ET44ACH) leads a coal train through Palmer Lake, Colorado.
Cloud shadows skirt Byers Canyon as the California Zephyr runs through a tunnel as it heads west towards Glenwood Springs.
UP Rio Grande Heritage #1989 (SD70ACe) still looks good as it leads a freight past a silo at Peckham, Colorado on the Greeley Sub.
Light snow has fallen throughout the area around the Hermosa Tunnels as UP 2752 (C45AH) leads a freight into the cut on the west side of the tunnel portal.
Light snow has been falling as UP 6393 (AC4400CW) exits the east portal of the Hermosa Tunnels as it heads towards Cheyenne, Wyoming on the Transcon Line.
Light snow and sun catch UP 8719 (SD70ACe) as it gets ready to enter the Hermosa Tunnels on the Transcon Line in Wyoming.
Heavy snow blankets UP ACe 8956 as it backs a freight into the Cheyenne Yard in Wyoming.
Snow is falling as UP heritage engine #1989 (Rio Grande SD70ACe) passes under the signals at Tie Siding, Wyoming.
UP 7242 (AC4400CW) leads an oil can train through Hot Sulphur Springs, Colorado as it heads east towards the Moffat Tunnel.
BNSF 2549 (GP39-3) waits at the Longmont Depot in for the orders to run to Boulder, Colorado.
BNSF 8809 (SD70MAC) approaches the historic Longmont Depot, which was built in 1898 by the Colorado and Southern Railroad.
The California Zephyr #6 train leaves Fraser, Colorado and heads towards the Winter Park ski resort.
The California Zephyr looks like a model train as it runs through Byers Canyon west of Hot Sulphur Springs, Colorado.