UP 5758 (ES44AC) runs solo through the signals in Denver, Colorado.

Coal is still king on the Joint Line as triple DPU's shove a loaded coal through Monument, Colorado.

BNSF 9103 (SD70ACe) shoves a loaded coal train through Larkspur, Colorado on the Joint Line.

BNSF 8500 (SD70ACe) leads the beer train out of the Denver Yard and will head to the Coors Brewery in Golden, Colorado.

Storm clouds move in over Monument, Colorado as a BNSF coal train heads south on the Joint Line.

BNSF 8472 (SD70ACe) makes like an Alco and belches smoke in an effort to get a loaded coal train moving south on the Joint Line at Spruce, Colorado.

BNSF 2698 (GP39-3) joins other light power at the BNSF engine servicing facility in Denver, Colorado.

BNSF 5664 (AC4400CW) leads a train towards Boulder, Colorado on the Front Range Sub, passing the cooling ponds of the shuttered Valmont Power Plant.

BNSF 1880 (SD40-2) brings a cut of cars out of the Denver Yard for sorting.

UP 7505 (ES44AC) joins a nice mix of heavy and light power in the Union Pacific's North Yard in Denver, Colorado.

BNSF 7828 (ES44DC) leads a freight through Greenland, Colorado on the Joint Line.

BNSF 7828 (ES44DC) leads a long freight up the grade between Greenland and Spruce, Colorado as it runs south on the Joint Line.

BNSF 8444 (SD70ACe) shoves a loaded coal train past Barr Lake towards Denver, Colorado.

BNSF 7955 (ES44C4) leads a track safety measurement train past rock formations at Palmer Lake.

BNSF 7272 (ES44DC) runs through Monument, Colorado on the Joint Line.