Amtrak's special train runs south on the Joint Line between Sedalia and Castle Rock, Colorado, taking the newest Siemens Airo Cascades train to Pueblo for testing.

Amtrak's special train taking the newest Siemens Airo Cascades train to Pueblo, Colorado for testing passes through Greenland, Colorado as it heads south on the Joint Line.

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.

Amtrak engine #22 (P42DC) leads a train ferrying 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)

Amtrak engine #22 (P42DC) makes a rare visit to Palmer Lake, Colorado, as it takes a new Siemens Airo Cascades train to the testing track in Pueblo, Colorado.

Amtrak bringing the brand new Cascades Siemens Airo train through the bend in Palmer Lake on its way to Pueblo, Colorado.

It has been over 15 years since a passenger train has passed by the depot in Colorado Springs, Colorado. Amtrak was taking the new Cascades Siemens Airo train to the testing facility in Pueblo Co... (more)

A rare Amtrak train on the Joint Line runs over the Santa Fe Bridge in Larkspur, Colorado. The train was ferrying the new Siemens Airo train from Denver to Pueblo, Colorado, where speed and other... (more)

A very rare sight happened today as Amtrak sent a passenger train on the Joint Line, ferrying the new Siemens Airo train from Denver to Pueblo, Colorado, where the train will be put through a vari... (more)

Airo Trainset on Joint Line A 965 1 25A is moving south after leaving Denver a special Amtrak move with new Airo “Cascades” train set for testing at Pueblo, CO. A spirited chase wi... (more)

Airo Trainset on Joint Line A 965 1 25A is moving south after leaving Denver a special Amtrak move with new Airo “Cascades” train set for testing at Pueblo, CO. A spirited chase wi... (more)

Airo Trainset on Joint Line A 965 1 25A is moving south after leaving Denver a special Amtrak move with new Airo “Cascades” train set for testing at Pueblo, CO. A spirited chase wi... (more)

Airo Trainset on Joint Line A 965 1 25A is moving south after leaving Denver a special Amtrak move with new Airo “Cascades” train set for testing at Pueblo, CO. A spirited chase wi... (more)