A northbound BNSF empty ballast train led by a trio of GE's enters a hole of sunshine as the train trundles through the open prairie near Owl Canyon, Colorado on April 9, 2018.

A herd of llamas relaxes in the cool evening air, although some get spooked by the "Thoroughbred of Transportation" as it runs light down Berthoud Hill near the town of Berthoud, Colorad... (more)

The third of four eastbounds is seen racing out of the sunset through the small town of Roggen, Colorado along BNSF's Brush Subdivision on March 30, 2018

On April 9, 2016, an eastbound Union Pacific loaded oil train pops out of Tunnel 1 into a small pocket of sunshine (literally) on a gorgeous spring afternoon in Coal Creek Canyon.

The day is almost over as the Provo-Lincoln manifest races through the small town of Roggen, Colorado on March 30, 2018. This is the second of four eastbounds that the westbound coal load in the b... (more)

With a few minutes left before sunset, BNSF B40-8 No. 573 and GP39-3 No. 2598 lead the "Buck Local" north approaching Dillon Road in Louisville, Colorado on March 19, 2018.

In the vast open spaces north of Fort Collins off of the Interstate 25 exit at Buckeye Road, a northbound BNSF empty ballast train trundles north near Owl Canyon, Colorado on April 9, 2018.

On a gorgeous spring evening, two BNSF C44-9W's lead a northbound stack train across the vast open spaces near Norfolk, Colorado on April 9, 2018.

On a gorgeous winter afternoon, the "Longmont Switch" races by farm fields that have had their fertilizer (cow manure) laid down recently just north of Longmont, Colorado on February 27,... (more)

Running on the wrong left-hand main is the South Seattle-Alliance merchandise/intermodal train that can be seen through a stone arch bridge at Spruce just north of Palmer Lake, Colorado on March 1... (more)

A group of llamas go about their own business as BNSF ES44C4 No. 4239 leads a northbound manifest down Berthoud Hill near Berthoud, Colorado on April 4, 2018.

Vehicles on Interstate 76 race across the high plains as an eastbound welded rail train approaches the west end of Bijou siding about a few miles west of Fort Morgan, Colorado on March 30, 2018. I... (more)

There is some fall color left as a pair of Burlington Northern painted SD70MACs Nos. 9621 and 9646 cross the Cache La Poudre River in Fort Collins, Colorado on October 27, 2017.

It is just after sunrise as a pair of Burlington Northern painted SD70MACs Nos. 9621 and 9646 race north as lite power on the "Longmont Switch" at Berthoud, Colorado on October 27, 2017.... (more)

Thick smoke from numerous wildfires fills the sky creating hazy atmospheric conditions. A loaded BNSF coal train waits in the sag at Spruce just north of Palmer Lake, Colorado on Main 1 as the Bel... (more)