A trio of BNSF EMD's elephant style leads a westbound loaded sand train across the high desert between Green River and Sphinx, Utah, on March 16, 2019.

Union Pacific SD70M No. 4812 leads the Potash Local, symboled "LDG51B" westbound through the tight cut approaching the Corona Arch Trailhead near Moab, Utah, on March 15, 2019.

BNSF C44-9W No. 4668 leads an eastbound Provo manifest down the grade through Coal Creek Canyon, Colorado, approaching Blue Mountain Road, on February 23, 2019.

Four llamas group together where two of the four watch the "Longmont Switch" led by ex-Burlington Northern SD70MAC Nos. 9621 and 9709 race down Berthoud Hill, near Berthoud, Colorado, on... (more)

High winds blow snow across the double main and US-30/287 as Union Pacific SD70AH No. 8844 leads a westbound manifest through Bosler, Wyoming, on January 26, 2019.

A light breeze adds to the already cool and crisp air as BNSF ES44AC No. 6285 leads the Provo-Denver manifest through the tunnel district near Plainview, Colorado, on January 19, 2019.

The continental divide can be seen in the background as Union Pacific ES44AH No. 8159 leads the Grand Jct-North Yard manifest through Crescent, Colorado, on January 19, 2019.

BNSF ES44C4 No. 6552 leads a Ferromex ES44AC on this empty LPG tank train through the "roller coaster" at Gunbarrel, Colorado, on January 12, 2019. The train is headed back to Sidney, Mo... (more)

It's not so often a pair of heritage units meet each other in broad daylight, let alone at the depot in Cheyenne, Wyoming. Heading east, Union Pacific SD70ACe No. 1983 meets Union Pacific SD70... (more)

Just west of Hillsdale, Wyoming, Union Pacific SD70ACe No. 1995 leads the "MNPPC" west at a whopping '20 MPH' as it approaches a grade crossing and Operation Lifesaver display, on Januar... (more)

In last light (literally), Union Pacific SD70ACe No. 1996 leads this loaded coal train from West Elk Mine, Colorado to Avon, Ohio north out of Nunn, Colorado, near the US-85 overpass, on December ... (more)

The sun pops out as BNSF SD60M No. 1404 leads an SD70MAC and SD40-2 on this westbound manifest as it rounds the big sweeping curve outside of Keenesburg, Colorado, on December 3, 2018.

Moments after sunset, an eastbound empty BNSF coal train races east along farm fields and US-6 just outside of Hillrose, Colorado, on December 4, 2018.

In the crisp cold air, the brakeman on the "Buck Local" is about to enter the depot in Longmont, Colorado, where the conductor is also grabbing some paperwork before heading south to Bou... (more)

It is just after sunset as BNSF ES44C4 No. 6764 leads a southbound manifest up the 2-percent grade to the top of Burkes Hill near Louisville, Colorado, on November 18, 2018.