The California Zephyr climbs Big Ten Curve as it heads up the 2% grade on the Moffat Tunnel Sub.

UP 6643 (AC4400CW) leads a coal train down the hill from Big Ten Curve as the single DPU at the rear of the train enters the curve from the top.

The California Zephyr runs through 'The Cut' as it heads towards Rocky, Colorado on the Moffat Tunnel Sub.

UP 6276 (ES44AC) is framed by the trees at Rocky, Colorado.

The California Zephyr meets a Kansas City Southern train waiting on the siding in Rocky, Colorado.

Oil From Arena and Big Ten
Significant spring snow is clearing from the foothills of the Front Range near Big Ten while loaded oil is slowly working it’s way into Denver.

The California Zephyr gets a run-by observation from the conductor on the KCS coal train waiting on the Rocky siding. After the Zephyr passes the coal train will head to Denver.

The California Zephyr runs through Rocky, Colorado as it heads towards Big Ten Curve and the Moffat Tunnel Sub.

UP 5382 (ES44AC) begins the climb through Big Ten Curve which will help the train achieve a constant 2% grade in elevation.

UP 5382 (ES44AC) leads a power heavy move around Big Ten Curve as it heads into Moffat Tunnel territory.

BNSF 8390 (ES44C4) leads a freight from Arvada towards Rocky, Colorado on the Moffat Tunnel Sub.

Amtrak's Winter Park Express Ski Train is about to conclude another successful year shuttling skiers and snowboarders from Denver to the Winter Park Ski Resort.

After stopping at Denver's Union Station to dropp off and take on passengers, the California Zephyr headed west on the Moffat Tunnel Sub and climbed up the Big Ten Curve.

The Amtrak Winter Park Express Ski Train has had a successful year, shuttling passengers to and from Denver and the Winter Park resort. Every Friday, Saturday and Sunday morning those living on B... (more)

The California Zephyr runs through Big Ten Curve as it climbs up towards the Moffat Tunnel District.