Eight GE and EMD locomotives are leading Union Pacific’s MNYRO westbound as it approaches Big 10 Curve between Rocky and Eisele, Colorado, on February 9, 2015.

Union Pacific’s Denver to Salt Lake City manifest freight MNYRO climbs through a snowy Big 10 Curve between Rocky and Clay, Colorado, on February 2, 2014. Four GE AC4400CWs on the point of the f... (more)

Following the Colorado River is UP freight MNYRO as it rounds the big sweeping curve at McCoy on the Dotsero Cutoff.

Four GE AC4400CWs lead Union Pacific’s MNYRO (North Yard, Denver to Roper Yard, Salt Lake City) manifest freight climbing though a snow-covered Big 10 Curve between Rocky and Eisele, Colorado, o... (more)

Beautiful fall colors are found along the banks of the Colorado River as freight train MNYRO heads west with an all EMD consist.

Fall color is peaking west of the Continental Divide as Denver North Yard to Salt Lake City Roper Yard freight MNYRO rounds the curve at Burns as it heads west for Grand Junction.

A westbound Union Pacific manifest freight climbs the mesa where Big 10 Curve is located on the climb up the front Range of Colorado’s Rocky Mountains on the afternoon of June 20, 2018. The head... (more)

Rounding Big 10 Curve west of Rocky, Colorado, is a westbound Union Pacific manifest freight with lone DPU GE AC4400CW No. 6216 shoving hard on the rear on the afternoon of June 20, 2018. In the b... (more)

With the city of Denver far in the background, a Union Pacific freight swings through “Little 10 Curve” at Rocky, Colorado, on the afternoon of June 20, 2018.

On the afternoon of October 8, 2015, Union Pacific’s MNYRO (North Yard in Denver to Roper Yard in Salt Lake City) manifest freight curves out of Little Gore Canyon just east of Radium, Colorado,... (more)

Union Pacific’s MNYRO leaves the great plains and Denver behind as it climbs out of Leyden, Colorado, on June 19, 2017.

On the beautiful autumn day of October 8, 2015, Union Pacific’s MNYRO manifest freight heads west out of Granby, Colorado, at a location known as Windy Gap.

With the warm, pastel colors of sunset settling in over Denver, three new Union Pacific EMD SD70ACe-T4s lead MNYRO out of Leyden, Colorado, at 8:10 p.m. on June 14, 2017. The three T4s—Nos. 3027... (more)

Colorado is blanketed with a fresh snow and there is a cold air inversion at lower elevations on February 2, 2014, as Union Pacific’s Denver to Salt Lake City manifest freight passes through Roc... (more)

Westbound Union Pacific MNYRO approaches Big 10 Curve west of Rocky, Colorado, on the morning of August 11, 2015.