A westbound stack train at Summit on the Hi Line in Montana.

A westbound BNSF grain train enters double track at Summit after climbing the east slope of Marias Pass

Amtrak #8 the eastbound Empire Builder climbs Marias Pass on a hazy Saturday morning.

A quartet of BNSF GE products are in charge of train Q-PTLCHC1-27A as the train battles the grade near the summit of Marias Pass. In less than a mile the train will have reached the summit of Mari... (more)

A trio of BNSF GEs ease a wesbound grain train bound for the Pacific coast over the top of the continental divide at Summit Montana on BNSF's famous Marias Pass. Here the continental divide is at ... (more)

A westbound BNSF grain train passes autumn colors east of Summit on October 8, 2018, while crossing Montana’s Marias Pass.

An early morning oil train approaches Marias Pass on at the United States Continental Divide.

The rear DPU of an Eastbound crude oil train reaches Maria’s Pass at the United States Continental Divide. Marias Pass, elevation 5,213 feet was once part of the Great Northern Railway.

With the stately snow-capped mountains of Glacier National Park in the background, a Burlington Northern Santa Fe freight led by GE C44-9W No. 5293 heads eastbound after topping Marias Pass just e... (more)

Atop Marias Pass on a snowy March 3, 1988, tiger-striped Burlington Northern EMD GP50 No. 3152 leads an eastbound freight through a blizzard at Summit, Montana. Trailing No. 3152 are two more GP50... (more)

BNSF 5535 and three Canadian visitors are working hard in their final push to the summit of Marias Pass nearing the continental divide (5,216' here) and the Eastern border of Glacier National Park... (more)

An eastbound stack train reaches the summit of Marias Pass and slowly moves past parked MOW equipment.

Two Dash 9s and tired looking warbonnet, still in Santa Fe lettering, crawl through the "Marias Crossovers" with a highball from an eastbound. The train has just crested the continental ... (more)

All green—almost
A quartet of Burlington Northern EMD SD40-2s and a GE B30-7A booster power westbound unit grain train G05 just east of Summit on Montana’s Marias Pass. An almost al... (more)

A heavy westbound BNSF grain train tops Marias Pass in a light snowfall at Summit, Montana, on October 10, 2018. Winter always seems to come early to the higher elevations of Big Sky Country.