AMTK 79501 (Siemens ALC-42) runs through Monument, Colorado on its way to a test track in Pueblo, Colorado.

The foothills of the Colorado Front Range provide a scenic background for the Amtrak special that led the newest Siemens Airo Cascades train to Pueblo, Colorado for testing.

An Amtrak train runs south on the Joint Line through Castle Rock, Colorado as it makes its way from Denver to Pueblo, on the Joint Line.

A special Amtrak train made its way from Denver to Pueblo, Colorado, running along the Front Range via the Joint Line. The rare passenger train on the Joint Line was due to Amtrak taking its new ... (more)

Light snow is falling as BNSF 5899 (ES44AC) runs through the trees in Monument, Colorado.

Kansas City Southern #4738 (ES44AC) leads a loaded coal train through Monument, Colorado on the Joint Line.

A railfan stops to get a picture of KCS 4738 (ES44AC) leading a coal train over the Rio Grande bridge in Monument, Colorado.

BNSF 5899 (ES44AC) leads an Executive MAC and freight train south on the Joint Line through Monument, Colorado.

BNSF 7846 (ES44DC) leads a freight south on the Joint Line through Monument, Colorado.

UP 8112 (ES44AH) leads a freight south on a snowy Joint Line through Monument, Colorado.

UP 8112 (ES44AH) runs over the Rio Grande bridge in Monument, Colorado.

UP 8112 (ES44AH) leads a train of gondolas south on the Joint Line through Monument, Colorado.

BNSF 5235 (Dash9) leads an intermodal train south on the Joint Line through Monument, Colorado.

BNSF 9213 (SD70ACe) muscles an empty coal train through Monument, Colorado as it runs north on the Joint Line.

BNSF 7846 (ES44DC) leads a freight over the Rio Grande bridge in Monument, Colorado as it heads south on the Joint Line.