To help trains manage the drop in grade from Coal Creek Canyon to Rocky, Colorado, there was constructed a series of sweeping curves known as Big Ten and Little Ten curves that help with the trans... (more)

With the Boulder Flatirons in the background, the California Zephyr rounds Little Ten Curve and will soon transition through the Big Ten Curve as it climbs the foothills towards the Colorado Rocky... (more)

BNSF 6524 (ES44C4) has just led an oil can train through Big Ten Curve and gets ready to split the signals at Rocky, Colorado.

Amtrak 73 (P42DC) leads the California Zephyr through Rocky on its way into the Colorado Rocky Mountains. The windmills in the background are at the National Center for Atmospheric Research (NCA... (more)

An eastbound Union Pacific coal train drops downgrade into Rocky, Colorado, while heading east on the former Rio Grande Moffat Tunnel route on April 13, 2002.

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)

With snow showers rolling down the foothills, UP 3027 (SD70AH-T4) brings a power-heavy coal train through the signals at Rocky, Colorado.

Storming Warbonnet in the Brush

Classic Knickerbocker Red and Yellow with a touch of Native American legend storms the remains of the Moffat Sub for Denver.

Leaning Into it at Rocky

Nearly new UP SD70ACe T4 leads empty coal destined for W. Elk from Cora, IL. Added at the last moment this afternoon at C&S Junction it was a last ... (more)

Looking more like something out of a Tim Burton movie of a spider ready to catch a train, here we see the California Zephyr arriving at the Rocky siding at dusk, its light shining through some tre... (more)

UP 8794 (SD70ACe) leads five other UP engines around Big Ten Curve and then will head to the Union Pacific's North Yard in Denver, Colorado.

UP 3027 (SD70AH-T4) leads a string of 9 other UP engines as they pull a long freight past the Rocky siding on their way to Denver, Colorado.

Amtrak 69 (P42DC) round the corner at Big Ten Curve and will soon enter the tunnel district on the Moffat Tunnel line through the Colorado Rocky Mountains.

BNSF 6524 (ES44C4) is seen through a duck blind leading a freight through Rocky, Colorado.

After passing through the mountain snow storm (which can be seen in the background), the UP freight headed by 3027 (SD70AH-T4) leads 9 other power units including the heritage 'The Katy' through R... (more)