This wide angle view shows BNSF 7068 (ES44C4) leading a long train through Little Ten Curve in the lower left and Big Ten curve on the right. Also visible is the Denver skyline in the upper right ... (more)

After running through Big Ten Curve BNSF 7068 (ES44C4) leads a long freight towards the Little Ten Curve and will soon pass through the Rocky Siding.

A Union Pacific manifest freight curves through Rocky, Colorado, on May 13, 2017, while working westbound on the Moffat Tunnel Subdivision. Downtown Denver, in the background, is 16 miles away “as... (more)

Union Pacific EMD SD70ACe No. 1943 leads a westbound passenger train (office car special) on UP’s former Rio Grande Moffat Tunnel route west of Rocky, Colorado, on August 21, 2019.

BNSF 7714 (ES44DC) muscles a freight through Rocky, Colorado and heads towards Big Ten Curve.

The California Zephyr rounds Big Ten Curve as it heads towards Rocky, Colorado.

A westbound Union Pacific coal empty, powered by three GE AC4400CWs, climbs upgrade around “Little 10 Curve” at Rocky, Colorado, on UP’s former Rio Grande Moffat Tunnel Subdivision on the afternoo... (more)

After running through Little Ten Curve the California Zephyr rounds the base of Big Ten Curve which will elevate the train to the track seen in the background.

After picking up two private Patrick Henry cars at Denver Union Station, the California Zephyr headed west and is seen here navigating Little Ten Curve as it starts its climb into the Colorado Roc... (more)

Union Pacific’s Denver to Phippsburg freight rumbles through Rocky, Colorado, on the afternoon of October 23, 2011. Three levels of track can be seen here, and the freight will negotiate them all ... (more)

UP 8455 (SD70ACe) assists a BNSF Grinstein MAC in shoving a BNSF freight through Rocky, Colorado in heavy fog and light snow.

BNSF 6948 (ES44C4) leads a freight in dense fog and snow through Rocky, Colorado as it gets ready to climb the Moffat Tunnel Sub into the foothills along the front range.

Amtrak engine 69 leads the California Zephyr through Little Ten Curve and will soon enter Big Ten Curve as it gains elevation climbing into the foothills of the Colorado Rocky Mountains.

BNSF 7016 (ES44C4) pulls a freight through Rocky, Colorado.

UP 6686 (AC4400CW) leads a freight through Rocky, Colorado.