Denver & Rio Grande Western 491 steams out of the roundhouse on a sunny May morning.

BNSF 6190 (ES44AC) leads a loaded coal train through Greenland, Colorado as it heads south on the Joint Line.

UP 6179 (ex-Southern Pacific AC4400CW) leads a power-heavy lash up as it waits for a green signal to head into the Colorado Rocky Mountains on the Moffat Tunnel Sub.

Amtrak's Phase VII heritage #174 (P42DC) backs the California Zephyr 6 train into Denver's Union Station.

There is a lot to see in this picture of the yard at the BNSF Denver engine servicing facility, including an ACe BNSF 8579, two armored cabooses of the Department of Energy, a special container ve... (more)

BNSF 5102 (Dash9) leads a stack train towards Spruce, Colorado on the Joint Line.

Amtrak #6 has just crossed into Colorado from Utah at the mouth of Ruby Canyon

Durango & Silverton 480 emerges from one of the many rock cuts at Rockwood with its passenger train as it returns to Durango.

BNSF 5697 (AC4400CW) leads a loaded coal train through Littleton, Colorado as it runs southbound on the Joint Line.

BNSF 6190 (ES44AC) runs towards Palmer Lake on the southbound track of the Joint Line.

BNSF 5102 (Dash9) runs through the nearly 180-degree curve in Palmer Lake, Colorado.

BNSF 5102 (Dash9) crosses over one of the original Rio Grande bridges in Monument, Colorado.

In this shot you can see the long stack train winding through Greenland, Colorado, as it run south on the joint line.

Rio Grande Southern 20 pulls out of the roundhouse early in the morning before a long day of work.

Durango & Silverton 473 and 480 start the steep climb up Hermosa Hill on a sunny May morning.