Montana Rail Link’s MLAUMIS passes Toston Dam in Lombard Canyon east of Toston, Montana, on June 28, 2016. EMD SD70ACes Nos. 4300 and 4403 power the Laurel to Missoula manifest freight.

An eastbound BNSF manifest freight follows the Missouri River past Toston Dam in Lombard Canyon east of Toston, Montana, on May 15, 2013.

Montana Rail Link 840 local (Helena local) heads west past Toston Dam in Lombard Canyon east of Toston, Montana, on June 27, 2016, powered by EMD SD70ACe No. 4315 and SD45 No. 382. Unfortunately, ... (more)

Montana Rail Link’s 840 Helena local curves toward Toston, Montana, along the Missouri River in Lombard Canyon on a cool September 21, 2008. Powering the westbound train returning to Helena is E... (more)

A westbound BNSF grain train follows the placid waters of the Missouri River as it travels through Lombard Canyon east of Toston, Montana, on the morning of June 26, 2016.

Led by BNSF C44-9W No. 5107, a westbound “Boeing Special” cruises through Lombard Canyon east of Toston, Montana, on the morning of June 26, 2016.

A westbound BNSF coal train arcs along the Missouri River in Lombard Canyon east of Toston, Montana, on the afternoon of June 27, 2016.

On the beautiful afternoon of June 27, 2016, an eastbound BNSF manifest freight rumbles by Toston Dam in Lombard Canyon east of Toston, Montana, on Montana Rail Link’s Second Subdivision.

With a classy caboose bringing up the markers, a lengthy Montana Rail Link work train heads into the depths of Lombard Canyon east of Toston, Montana, on June 26, 2016. The train is headed to Whit... (more)

A lengthy Montana Rail Link work train curves along the Missouri River in Lombard Canyon east of Toston, Montana, on June 26, 2016. Two MRL SD40s (rebuilt and labeled SD40-2XRs) Nos. 264 and 257 p... (more)

A morning westbound manifest passes Toston Dam. Toston Dam was built in 1940. The Northern Pacific had to raise and relocate a portion of their mainline thru the canyon for the project...

A manifest snakes along the banks of the Missouri River in Lombard Canyon. In July 1805, the Lewis and Clark expedition camped near this location...The camp ground at the lower right is popular s... (more)

An eastbound BNSF vehicle train crosses a bridge over Big Spring east of Toston, Montana, on June 26, 2016. This incredible clear “pond” filled by a natural spring opens to the Missouri River,... (more)

A BNSF grain train cruises through Toston, Montana, framed by the old highway truss bridge over the Missouri River on June 23, 2015.

Doing some running on the banks of the Missouri River in Lombard Canyon east of Toston, Montana, is westbound Montana Rail Link MLAUMIS (Laurel to Missoula manifest) on June 24, 2015.