AMTK 11 leads the California Zephyr up the steep grade to Tunnel #1 and will soon pass through 31 tunnels as it winds its way through the Colorado Rocky Mountains.

UP 6049 (AC44CWCTE) leads a long coal train down the mountain from Tunnel 1 and has made the 180 degree turn in Coal Creek Canyon as it heads toward the Big Ten curve. Three helper units provide ... (more)

Heavy snow is falling along the Colorado Front Range as the California Zephyr heads into the Rocky Mountains.

The morning California Zephyr out of Denver gets a late start heading into the Rocky Mountains, and as the train crosses Blue Mountain Drive you can see a railfan taking pics as it passes.

Union Pacific EMD SD70ACe-T4 No. 3035 leads the last MRONY (Roper Yard in Salt Lake City to North Yard in Denver) freight over Blue Mountain grade crossing west of Eisele, Colorado.

Leaving Denver behind on a beautiful June 9, 2013, afternoon, a westbound Union Pacific coal empty wraps itself around Big 10 Curve as the head end passes by the east switch at Eisele, Colorado, d... (more)

Four GE AC4400CWs lead Union Pacific’s MNYRO (North Yard, Denver to Roper Yard, Salt Lake City) manifest freight climbing though a snow-covered Big 10 Curve between Rocky and Eisele, Colorado, on ... (more)

Last MRONY
On December 8, 2018, EMD SD70ACe-T4 No. 3035 leads the last MRONY (Roper Yard in Salt Lake City to North Yard in Denver) freight at Blue Mountain grade crossing west of Eisele... (more)

Two Kansas City Southern EMD SD70ACes power a westbound 73-car Union Pacific oil train around Big 10 Curve west of Rocky, Colorado, on February 13, 2016.

Union Pacific’s manifest freight from Salt Lake City to Denver drops downgrade at Eisele, Colorado, on the afternoon of February 13, 2016. Above the locomotives is the west switch at Rocky, where ... (more)

An eastbound BNSF manifest freight fills Big 10 Curve as it drops downgrade from Eisele to Rocky, Colorado, on the afternoon of February 13, 2016.

With some recent moisture, even the grasses on the front range mountains have started to turn green. On the afternoon of May 4, 2018, Amtrak’s eastbound California Zephyr descends the trackage thr... (more)

A westbound BNSF manifest freight climbs the 2% grade through Eisele (formerly Clay), Colorado, on the afternoon of June 9, 2014. Leading the train is repainted GE C44-9W No. 4490, followed by AC4... (more)

An eastbound BNSF freight fills Big 10 Curve between Eisele and Rocky, Colorado, on the warm afternoon of February 9, 2015. The 76-car train is made up of mostly tank cars—73 to be exact.

An eastbound BNSF manifest freight encircles Big 10 Curve between Eisele (Clay) and Rocky, Colorado, on February 14, 2015.