BNSF 7145 muscles a coal past Barr Lake.

KCS 4604 (AC4400CW) shoves a loaded coal train towards Sedalia, Colorado.

BNSF 5954 (ES44AC) winds through the 'S' curves just to the north of Palmer Lake, Colorado.

BNSF 5954 (ES44AC) moves a coal train past the iconic red barn in Greenland, Colorado.

The turbulent skies begin to form the massive thunderstorms which will pummel the afternoon rail traffic with flooding rain and pounding hail.

Severe thunderstorms have blanketed the Colorado Front Range, and BNSF 5411 briefly catches a spot of sun as it outruns the hard rain and hail on its way to Larkspur.

ConAgra 1134 (SW1200) makes a rare appearance after shuffling some hoppers at a grain silo in Commerce City, Colorado. They don't run this critter often so seeing her operate is a treat.

BNSF 2392 (GP39-3) brings in a fresh batch of oil cans to the refinery in Commerce City, Colorado.

UP 4014 runs through a field of wildflowers as it leaves on its tour of the Midwest states.

Faded Warbonnet 670 is on point going through the Denver Yard.

BNSF 3932 (ET44C4) leads a four engine consist as it transports a heavy transformer and a long freight through Broomfield, Colorado.

The BNSF needed some additional muscle to deal with the heavy weight of the transformer.

BNSF 1826 (SD40-2) works a small yard in north Denver, shuffling cars along side a well-tagged BN caboose.

A BNSF mixed freight runs past the shuttered Valmont Power Plant in Boulder, Colorado. The plant was once the largest power station west of the Missouri River. The coal-powered plant closed in 2... (more)

There is always something unique to see in the UP North Yard, including UP 1349, a former Denver & Rio Grande Railroad GP40-2.