The westbound California Zephyr has just come out of Big Ten and passed by Clay siding on its way to Tunnel 1 and the climb up the Front Range out of Denver.

January in Colorado is one of the sunniest months. On February 2 some of that sun has carried over a couple days as a eastbound grain empty exits Tunnel 1 on the Moffat Tunnel Subdivision. This da... (more)

UP 7080 (AC4400CW) shoves a coal train through the S curve under Highway 93 as it heads towards Denver.

The time is 5:41PM and Amtrak #6 is on time for a 6:30PM arrival in Denver. This location is the oft photographed Big Ten curve, so named for its degree of curvature. This trackage is in the trans... (more)

BNSF7034 leads a morning manifest up the Moffat Road at Tunnel 1. The "V" made by the two mountains in the background is Coal Creek Canyon. A earlier attempt to breech the Front Range by the Denv... (more)

UP 6825 and mate are DPUs on the back of a coal train that is descending through the Big Ten Curve area west of Denver, CO. It is shown under Clay siding, in Little Ten Curve.

BNSF 7350 (ES44DC) muscles a fright towards Denver on the Moffat Line.

"RTD at the Arvada Flour Mill" A RTD G Line train departs Olde Town Arvada Station passing by the Arvada Flour Mill. The Arvada Flour Mill is a historic mill built in 1925 which ... (more)

RTD commuter rail train 4029 (Hyundai P3) passes the Arvada Olde Town water tower as it heads towards downtown Denver, Colorado.

UP 6825 and a former SP AC440CW head a coal train downgrade through the Big Ten loop above Arvada, CO while their rear DPUs exit the east end of Clay siding above them.

Part I Sand Train. A BNSF sand train climbs up and around the horseshoe curve in Coal Creek Canyon. The 2% grade is evident here as the the head-end of the train passed over the 2 DPU AC u... (more)

A series of thunderstorms hammer the Denver Metro-Area dumping hail and heavy rain causing flash flooding as an eastbound UP ballast train descends the 2-percent grade on Big Ten Curve near Arvada... (more)

BNSF's Provo-Denver manifest descends the Moffat Road in heavy snow. This location is very popular with rail fans for its ease of access and spectacular scenery.

EMD Demonstrator 1206 leads a empty coal train under the flanks of the Rocky Mountains. The locomotives are doing traction testing on the high elevation, grades and curves of Union Pacific's Moffa... (more)

Dark clouds begin to fill the afternoon sky as BNSF H1 Dash 9-44CW #970 leads a sand train into Leyden Siding on the UP Moffat Tunnel Subdivision on August 5th, 2019.