From a ridge high above Eisele siding (formerly known as Clay) we see BNSFs daily freight from Denver to Provo slowly crawling up the eastern side of the Continental Divide.

Eight units are leading Union Pacific’s MNYRO westbound approaching Big 10 Curve between Rocky and Clay, Colorado, on the morning of April 22, 2006.

The Ski train heads West out of Denver approaching the Big Ten Curve on the last run of the 1991-92 Ski season. The power is a pair of immaculate looking engines, with Southern Pacific GP60 9738 ... (more)

Passing a Union Pacific freight in the siding at Rocky, Colorado, is an eastbound Burlington Northern Santa Fe business train on June 10, 2001. The train is returning from a trip to Parachute, Col... (more)

Approaching Rocky, Colorado, in Barbara Gulch is Union Pacific manifest freight MDVRO on January 6, 2001. Powering the westbound Denver to Salt Lake City train is new UP EMD SD70M No. 4271 leading... (more)

The American Orient Express climbs the Front Range of the Rockies approaching Big 10 Curve west of Rocky, Colorado, on September 6, 2001.

On August 26, 2013, Union Pacific was testing Electro-Motive Diesel’s SD70ACes on the Moffat Tunnel Subdivision west of Denver, Colorado. UP’s mobile laboratory car No. UPP 210 is bracketed by... (more)

Union Pacific was testing Electro-Motive Diesel’s SD70ACes on the Moffat Tunnel Subdivision west of Denver, Colorado, on August 26, 2013. UP’s mobile laboratory car No. UPP 210 is bracketed by... (more)

A crew member from an eastbound Union Pacific coal train (with Southern Pacific No. 369 leading) is on the ground at East Rocky, Colorado, to inspect the westbound Rio Grande Ski Train on the morn... (more)

Leaving Rocky, Colorado, on February 10, 2001, is an eastbound Burlington Northern Santa Fe freight, heavy with grain hoppers, traveling over Union Pacific’s former Rio Grande Moffat Tunnel Subd... (more)

On October 23, 2011, a Union Pacific coal empty climbs through Little 10 Curve at Rocky, Colorado. In a few minutes, the train will be passing on the track in the foreground at Clay. The mixed tra... (more)

An eastbound Union Pacific coal train meets a BNSF manifest freight in the siding at Rocky, Colorado, on the afternoon of June 28, 2014.

Amtrak No. 5, the westbound California Zephyr, is climbing the grade toward Big 10 Curve west of Rocky, Colorado, on September 6, 2001. In the background waiting in the siding at Clay is an eastbo... (more)

BNSF units 5634, 4063, 4902, 232 and 6208 lead a train of mixed freight up the grade out of Rocky, CO., on a beautiful summer morning.

BNSF units 5634, 4063, 4902, 232 and 6208 lead a train of mixed freight around the Big Ten Curve and a warm summer morning.