Snow dusts the mountains of Glacier National Park on Marias Pass on the autumn day of October 8, 2018, as a westbound BNSF grain train approaches Bison, Montana.

Eastbound mixed freight.

Surrounded by a winter wonderland on the southern border of Glacier National Park, Amtrak’s eastbound Empire Builder has just summited Marias Pass and approaches Bison, Montana, on a snowy March... (more)

It can’t decide it whether it’s winter or fall as snow mixes with bright yellow trees on Marias Pass as a westbound BNSF grain train approaches the east switch at Bison, Montana, on October 8,... (more)

BNSF 4755 leads a westbound oil train as it passes through Bison Siding on BNSF's Hi-Line Subdivision.

Builder at Bison
Amtrak’s eastbound Empire Builder crosses the big fill just east of Bison, Montana, during a snowy crossing of Marias Pass on December 21, 1998. Three GE P40DC “Gen... (more)

BNSF 6300 West climbs the east slope of Marias Pass.

An eastbound grain train rolls through Bison, Montana in Glacier National Park.

Two BN SD40-2 and a Soo Line visitor. Make there way over Marias pass on the high line.

An A-B-A lashup on the Burlington Northern EMD style, in an era that's hard to do. I believe B unit 7500 is one of a kind, it's a SD40-2 wreak rebuild.

This BNSF freight with a nice Santa Fe consist has their train stretched around 5 curves as they climb the east slope of Marias Pass during the Columbus Day weekend in 1997.

A disinterested horse plods along as an eastbound Burlington Northern Santa Fe freight rumbles through Bison, Montana, while crossing Marias Pass on the southern border of scenic Glacier National... (more)

A nice clean merger consist rolls east off Marias Pass in October 2000. A thin layer of ice covers the pond as cold weather comes early to upper elevations.

A thin coating of ice covers a pond as the eastbound Empire Builder descends the eastern slope of Marias Pass.