Former Burlington Northern 1659 (SD40-2) leads a freight towards Sedalia, Colorado.

A Burlington Northern veteran SD40-2 winds a freight through the S curves east of Sedalia, Colorado.

A former Burlington Northern SD40-2 leads a freight through the S curve east of Sedalia, Colorado.

A former Burlington Northern SD40-2 rests in the BNSF 31st Street Yard Roundhouse awaiting minor repair between switching duties.

A matched pair of Cascade SD40-2s rounds the curve on the north end of Sedalia, CO with the day's Pikes Peak Local in tow.

A pair of former BN SD40-2 rounds the curve and heads south out of Larkspur, CO with the remainder of the Pikes Peak local in tow.

A cascade duo leads the Pikes Peak Local out of Littleton, CO on the Joint Line.

After leaving Colorado Springs and running through Palmer Lake, Greenland, Larkspur, Castle Rock, Sedalia, and Littleton, BNSF 1659 (SD40-2) arrives in Denver.

BNSF 1659 (SD40-2) leans into the curve as it approaches Sedalia, Colorado with a short freight. It is good to see a BN cascade green unit still running freight.

Two former BN Cascade 40s lead what's left of the southbound Pikes Peak Local through Palmer Lake, CO passed the famed "railfan hump."

As close to pure BN as you can get in 2020! Two former BN Cascade 40s lead the southbound Pikes Peak Local on the Colorado Joint Line. Having a BN rack first out was just the icing on the cake!

On some days, visiting the BNSF operations in Denver is like you entered Mr. Peabody's WABAC (wayback) time machine. Here we see a pair of former Burlington Northern cascade green engines working ... (more)

The BN lives! Well, sort of. On one of the last days of 2019 a set of cascade green EMD products leads the southbound Pikes Peak Local past Chatfield Dam. Hopefully these engines will last into th... (more)

It is still possible to find former Burlington Northern Cascade Green units running around the Denver area. This pair was spotted shuffling cars in the Denver Yard.

The freezing, wet snow and blizzard conditions of the 'Bomb Cyclone' required the crew to stop at every switch to ensure they were clean and functional.