The sun pops out for a few minutes as a northbound empty coal train led by BNSF SD70ACe no. 9189 heads up the middle of Atwood Street in Longmont, Colo., on May. 06, 2015.

Union Pacific SD70ACe no. 8551 leads two SD70M's around the sweeping curve just east of Milliken, Colo., at a location called Dent with the Fort Collins Local. The train will slow for the wye up a... (more)

Great Western Railway's Loveland job moves right along at 10 MPH just east of Loveland, Colo., with cars for Kelim and Johnstown. Power on today's train is a former Union Pacific GP38-2, now patch... (more)

It's a gorgeous afternoon in Northern Colorado with temperatures in the low 70's as Union Pacific's Fort Collins Local heads back to La Salle, Colo., after dropping off cars at Riverside in Fort C... (more)

BNSF SD70MAC no. 8941 leads a BN painted SD70MAC and BNSF SD70ACe on the Laurel, Mont., to Denver, Colo., manifest near Broomfield on October 28, 2013.

The late afternoon sun illuminates the area as BNSF SD75I no. 8295 leads two BNSF GE's through the siding at Longs Peak, Colo., on October 30, 2013 with the Fort Collins to Denver manifest.

Located a few miles southwest of Longmont along CO-HWY 119, the small community of Niwot, Colo., has a small Whistle Stop Park that features a CB&Q Caboose and a few other relics. The Buck Local c... (more)

Clouds continue to build over the Continental Divide as the last hopper cars clear the signals at the west end of East Portal siding. The train is seen entering the 6.2 mile long Moffat Tunnel on ... (more)

In the morning fog, the Denver, Colo., to Fort Collins, Colo., manifest pulls forward at Highland after they made their 20 car set out. A dusting of snow fell over night as well on Oct. 30, 2013.

Amtrak's eastbound California Zephyr, train no. 6, led by P42DC no. 204 rounds the horseshoe over CO-HWY 72 in Coal Creek Canyon just west of Denver.

The DPU on BNSF's westbound QDVPVJ 07 (Denver - Provo trackage rights manifest) is about to duck into Tunnel no. 29 just east of Pinecliffe, Colo., on Apr. 08, 2015.

After getting a dog-catch crew at Plainview, UP's Energy Mine, Colo., to Adams, Tex., loaded coal train (CEYLH 07) can be seen holding back as the train descends the 2.2% grade in Coal Creek Canyo... (more)

The DPU on UP's West Elk Mine to Canon City, Colo., loaded coal train (CWECC 07) brings up the rear as one can see most of the train snake through Coal Creek Canyon with part of the suburban part ... (more)

Three BNSF GE's lead the Denver, Colo., to Provo, Utah trackage rights manifest up the grade through what was once Tunnel no. 28 just east of Pinecliffe, Colo., on Apr. 08, 2015.

Amtrak's westbound California Zephyr train no. 5 rounds the curve out of Eisele as the train begins their climb up the 2.2% grade in Coal Creek Canyon towards the Continental Divide on Apri. 08, 2... (more)