Union Pacific MRONY heads eastbound out of Radium, Colorado, and is about to enter Little Gore Canyon on the afternoon of August 4, 2014. EMD locomotives powering the train are a pair of SD70Ms (N... (more)

Emerging out of thick morning fog, an eastbound BNSF freight rumbles across Noxon Bridge over the Clark Fork west of Noxon, Montana, just after sunrise on October 2, 2014.

Canadian National train No. 310 departs Swan Landing, Alberta, along Brule Lake on the afternoon of July 7, 2014. CN EMD SD75I No. 5756 leads a pair of GE C44-9Ws (2577 and 2599) and EMD SD70M-2 N... (more)

A clash of seasons
An early autumn snowfall in the higher elevations of Mullan Pass surrounds Austin Creek Trestle (a.k.a. Skyline Trestle) at Skyline, Montana, on October 11, 1997. Low... (more)

An eastbound BNSF freight crosses Noxon Bridge west of Noxon, Montana, just after sunrise on October 2, 2014. Fog is quickly burning off over the Clark Fork this cool morning on Montana Rail Linkâ... (more)

The calendar says spring, but the weather says winter at Crescent, Colorado, on April 23, 1999. Amtrak No. 5, the California Zephyr, climbs the Front Range of the Rockies through a snowy wonderlan... (more)

With late season thunderstorms rumbling over the Bookcliffs in the background, Union Pacific’s LJP45 “dirt train” local approaches Mounds, Utah, late on the afternoon of November 21, 2003. R... (more)

Amtrak No. 5, the westbound California Zephyr, has just exited 294-foot Tunnel 39 and is now threading 63-foot Tunnel 40 in the heart of Little Gore Canyon between Azure and Radium, Colorado, on t... (more)

VIA Rail’s train No. 2, the Canadian, rolls eastbound with 21 cars through Robertson’s Curve at Swan Landing, Alberta, on the afternoon of July 7, 2014. The spectacular Brule Range is softly r... (more)

With dark clouds and storms surrounding Lombard, Montana, on the afternoon of June 17, 2014, a BNSF coal train snakes along the Missouri River in scenic Lombard Canyon on Montana Rail Link’s Sec... (more)

An eastbound BNSF manifest freight passes by the old hopper car windbreak at Big 10 Curve west of Rocky, Colorado, on the afternoon of June 9, 2014. In the background is the city of Denver which i... (more)

An eastbound Burlington Northern freight trailed by two cabooses slinks around the curves through the Badlands west of Sully Springs, North Dakota, on July 27, 1992.

Canadian National train No. 111 passes Windy Point west of Devona, Alberta, on July 16, 2013, as it passes beautiful Jasper Lake and the rugged scenery in Jasper National Park.

A moment of sunshine lights up a BNSF intermodal west of Blacktail, Montana, over a stormy Glacier National Park on October 7, 1997. Two Burlington Northern EMD SD40-2s bracketing a GE B30-7AB pow... (more)

A westbound Canadian National freight exits rugged Black Canyon of the Thompson River west of Ashcroft, British Columbia, on June 24, 2006. In the foreground is the parallel Canadian Pacific main ... (more)