UP 6276 (ES44AC) leads an oil can train through Tolland, Colorado on the Moffat Tunnel Sub.

Amtrak engine #4 (P42DC) kicks up the snow as it leads the California Zephyr through Tolland, Colorado.

May Snow in the Rockies
Heavy snow left a winter wonderland along the South Boulder.

May Snow in the Rockies
A spring snow storm left over a foot of snow into a winter wonderland on this late May morning for the crew of this eastbound loaded oil train near the Grea... (more)

Heavy snow cakes the rock formations in Tolland, Colorado as the California Zephyr heads towards the Moffat Tunnel.

A spring snowstorm dumped heavy snow along the Colorado Front Range as well as the mountains. Here the California Zephyr runs through the trees at Tolland, Colorado on its way to the Moffat Tunne... (more)

BNSF 7485 (ES44AC) muscles a freight up the Moffat Tunnel Sub and will soon enter the 12-mile tunnel running under the Continental Divide.

BNSF 7485 (ES44AC) shoves a freight through the beautiful valleys and hills of Tolland, Colorado.

BNSF 7485 (ES44AC) is about to enter the 6.2-mile Moffat Tunnel and shove a freight under the Continental Divide.

BNSF 7485 (ES44AC) is running hard as it pushes a freight through Tolland, Colorado on the Moffat Tunnel Sub.

BNSF 7485 (ES44AC) shoves a freight towards the snow-covered Continental Divide and will soon be running into the 6-mile-long Moffat Tunnel.

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

Amtrak's Winter Park Ski Train seemingly dives into the east portal of the historic Moffat Tunnel and will spend the next 12 minutes in total darkness as it runs towards the Winter Park ski resort... (more)

After leaving Denver The California Zephyr heads up the Rocky Mountains on the Moffat Tunnel Sub, passing through 30 tunnels to get to the west slope and the next stop at Fraser, Colorado.

UP 5820 (AC4400CWCTE) runs a freight through the trees as it heads to the east portal of the Moffat Tunnel.