A partially ice-covered inlet of Trout Creek into the Clark Fork reflects an eastbound BNSF coal train crossing Bridge 55 at Trout Creek, Montana, on January 27, 2020.

A pair of GE AC4400CWs power an eastbound BNSF grain empty across the Clark Fork on Bridge 57 west of Trout Creek, Montana, on the morning of May 6, 2012.

The sun pops out on the short winter day of January 27, 2020, as an eastbound BNSF grain train approaches Trout Creek, Montana, on Montana Rail Link’s Fourth Subdivision.

Late in the “blue hour” of January 25, 2020, a BNSF freight churns westbound in the light rain past a frozen Frog Pond just west of Trout Creek, Montana. Moisture-laden air thick with fog off the ... (more)

An empty oil train heads onto the causeway that separates the "Frog Pond" from the Clark Fork just west of Trout Creek, MT as the trains rolls east on Montana Rail Link.

On the morning of October 3, 2016, an eastbound BNSF grain empty approaches Trout Creek, Montana, while traversing Montana Rail Link’s Fourth Subdivision toward Missoula.

Passing over a frozen Trout Creek, a westbound BNSF freight glides across Bridge 55 at Trout Creek, Montana, on January 26, 2020.

A westbound BNSF grain train passes through a frozen landscape heading westbound out of Trout Creek, Montana, on the afternoon of January 27, 2020.

On Montana Rail Link’s picturesque Fourth Subdivision that runs between Missoula and Sandpoint Junction, a westbound BNSF freight crosses Bridge 55 at Trout Creek late in the afternoon of January ... (more)

The open water surrounded by a partially ice-covered inlet of Trout Creek into the Clark Fork is dead calm, and reflects an eastbound BNSF coal train crossing Bridge 55 at Trout Creek, Montana, on... (more)

BNSF 7640 leads an empty oil train east across the causeway that separates the Clark Fork from a frog pond in the foreground near Trout Creek, MT. The train is a Montana Rail Link train running fr... (more)

The sun tries in vain to shine through heavy clouds and fog in the Clark Fork valley as an eastbound BNSF coal empty traces the southern shore of the river approaching Trout Creek, Montana, on Jan... (more)

Clouds rise on the afternoon of January 27, 2020, at Trout Creek, Montana, revealing fresh snow dusting the distant mountain ridge. Rain has just let up, letting the open water of Frog Pond to set... (more)

The “blue hour” is turning to night at a frozen Frog Pond just west of Trout Creek, Montana, on January 25, 2020. As a light rain falls on the moisture-laden snow, fog forms off the open waters of... (more)

A light rain and fog encompass a BNSF manifest freight as it heads west out of Trout Creek, Montana, on January 25, 2020.