Amtrak #6 has just exited tunnel 1 and descends the 2 percent grade into Coal Creek Canyon and will soon negotiate the Big 10 curve.

A westbound Union Pacific manifest thunders up the 2% grade leading to Tunnel #1 as it begins its journey into the Rocky Mountains.

Union Pacific freight MDVPV (Denver to Provo manifest) passes through fresh snow at Coal Creek Canyon east of Plainview, Colorado, on November 30, 2006.

Union Pacific’s MRONY (Salt Lake City’s Roper Yard North Yard in Denver) freight heads downgrade through a snowy Coal Creek Canyon between Plainview and Eisele (formerly Clay), Colorado, on Ma... (more)

Just down the mountain in Coal Creek Canyon, the sun shines, but there's still plenty of snow to go around. Seen here, BNSF ES44DC No. 7587 brings up the rear of the Denver, Colorado to Provo, Uta... (more)

Union Pacific AC4400CW-CTE No. 5823 leads the North Yard, Colorado to Roper Yard, Utah manifest extra (MNYROX 09) up the 2-percent grade out of Eisele (formally known as Clay, or still referred to... (more)

The sun comes in and out as loaded oil cans from Wash, Utah descend the 2-percent grade as the train negotiates the horseshoe curve in Coal Creek Canyon just west of Denver along the Moffat Road o... (more)

AMTK P40DC No. 822 and P42DC No. 145 both painted in the Phase III scheme lead Amtrak's westbound "California Zephyr" through the eastern rim of Coal Creek Canyon. The train has just cro... (more)

An eastbound BNSF coal train descends the Front Range of the Rockies at Coal Creek Canyon east of Plainview, Colorado, on May 5, 2014. Three brand-new EMD SD70ACes lead the train (Nos. 8533, 8531 ... (more)

It's an overcast afternoon along the Moffat Route as five UP GE's leads a Public Service of Denver to Energy Mine, Colorado empty coal train up the 2-percent grade in Coal Creek Canyon on March 07... (more)

Union Pacific SD70AH No. 8948 leads EMDX SD70ACe-T4 Nos. 1502 and 1503 along with three other UP units on a test train from Denver to Tabernash, Colorado (SDVTN 07) up the 2-percent grade in Coal ... (more)

For two days crews have been cleaning up the aftermath of a derailment near Tolland, just east of the Moffat Tunnel. Now, on January 30, 1966, F7A 5741 and 5744 ease down the 2 percent at Coal Cre... (more)

It's a gorgeous morning in Coal Creek Canyon as Amtrak's westbound "California Zephyr" led by two Phase III painted Genesis GE's climbs the 2-percent grade approaching Tunnel No. 1 on Fe... (more)

The sound of EMD's 710 diesel engine fills the air as two Kansas City Southern SD70ACe's Nos. 4187 and 4052 lead crude oil empties back to Wash, Utah as the train snakes through the s-curve in Coa... (more)

A repainted Union Pacific ES44AC No. 7623 brings up the rear of eastbound coal loads from West Elk Mine to Pasadena, Texas in Coal Creek Canyon near Arvada, Colorado on January 08, 2016.