BNSF 2692 (GP39-3) sits at the Longmont Depot as storm clouds build over the Front Range.

BNSF 2597 working the Martin Marietta spur off of the joint NS/BNSF Line through North KC

A pair of BNSF Geeps lead a freight through Brighton, Colorado, past Barr Lake on the Brush Sub.

BNSF 2548 (GP39-3) runs west on the Brush Sub past Barr Lake on its way towards Denver, Colorado.

Thunderboomers are pounding the east as BNSF 2548 (GP39-3) runs west on the Brush Sub towards Denver, Colorado.

BNSF 2585 (GP39-3) sits in the Denver Yard as the California Zephyr rolls by.

Some BNSF locomotives, including a rebuilt GP35 and a rebuilt GP30, are reflected in a puddle left by a recent rainstorm as they rest on one of the servicing tracks in Willmar, MN.

BNSF 2530 (GP39-3) moves a cut of wood cars to clients in Lafayette, Colorado.

BNSF 2530 (GP39-3) waits for orders to head to the yard in Longmont, Colorado for an assignment.

BNSF 2549 (ex AT&SF GP39-3) waits for orders to move a cut of oil cans at the refineries in Commerce City.

BNSF 2530 (GP39-3) leads a short freight up the Broomfield Siding on the Front Range Sub.

BNSF 2549 (GP39-3) moves a cut of cars in the yard at Hudson, Colorado.

BNSF 2530 (GP39-3) leads a short freight past the Valmont Power Plant in Boulder, Colorado.

BNSF 2530 (GP39-3) climbs the grade on the Longmont Siding.

BNSF 2530 (GP39-3) runs though Louisville, Colorado with a short freight