A westbound Union Pacific manifest climbs the twisting Big Ten Curves of the Moffat Road. Above the trains is Tunnel One and the Majestic Flatiron Rock Formations.... If you look hard you can fol... (more)

On a Perfect July morning, UPs three E9s and DDA40X lead up the Cheyenne Frontier Days passenger special. The train had a good run up the Greeley Sub, arriving in Cheyenne shortly before 10am. Her... (more)

It's that time of year again where the Union Pacific Railroad and The Denver Post run the annual Cheyenne Frontier Days passenger special between Denver, Colorado and Cheyenne, Wyoming. Union Paci... (more)

Clouds and some storms build up over the mountains at the Denver, Colorado to Casper, Wyoming manifest rolls north near Owl Canyon with BNSF C44-9W No. 730 leading on June 09, 2015.

Two Union Pacific ES44AC's lead the westbound Phippsburg, Colo., manifest through the gorgeous canyon between Tolland and Rollinsville along South Boulder Creek on May 26, 2015.

With the Front Range Flatirons dominating the scene, UP's West Elk Mine, Colorado to Blue Island, Illinois loaded coal train (CWEKS 25) led by ES44AH no. 8262 rolls on through the tunnel district ... (more)

A Union Pacific XCLX (Xcel Energy) coal train passes through Eisele (formerly Clay), Colorado, on the afternoon of June 9, 2013. Waiting for the eastbound is a coal empty sitting at Rocky siding d... (more)

Union Pacific's Roper Yard (Salt Lake City), Utah to North Yard (Denver), Colo., manifest rounds the curve at Tolland over South Boulder Creek after meeting the westbound Amtrak California Zephyr.

Amtrak 5, highball Tolland, out Amtrak's train no. 5, the westbound California Zephyr, races west through Tolland, Colo., as they meet UP 8846 east on a gorgeous Tuesday morning

The late afternoon sunlight illuminates Longs Peak Siding as a coal empty led by BNSF SD70MAC no. 9647 meets a southbound windmill blade train.

From high above Coal Creek Canyon, an eastbound Union Pacific coal train exits Tunnel 1 and loops over Highway 72 and Coal Creek. The lead locomotives are approaching Blue Mountain Drive grade cro... (more)

It's a gorgeous morning as Union Pacific's Roper Yard (Salt Lake City), Utah to North Yard (Denver), Colo., manifest rounds the curve at Tolland over South Boulder Creek. The train has just met th... (more)

Union Pacific SD70AH no. 8846 leads two AC6044CW's, an SD70ACe, and AC4400CW on the Roper Yard to North Yard manifest at the east end of the siding at Leyden in Arvada, Colo. Searchlight signals c... (more)

Amtrak train No. 5, the westbound California Zephyr, exits Tunnel 8 and curves around the former location of Tunnel 9 on a 2 percent grade through the tunnel district west of Plainview, Colorado, ... (more)

On a blistering July 24, 2009, and after the passage of Tie North 9068 tie gang at milepost 372 west of Julesburg, Colorado, a sun kink developed in the hot afternoon sun. This is not uncommon on ... (more)