BNSF 7561 (ES44DC) runs on a sweeping S curve through Castle Rock, Colorado while heading south on the Joint Line.

A fresh layer of snow greets the crew of BNSF 8465 (SD70ACe) as it runs a loaded coal train over a ridge at Castle Rock, Colorado.

BNSF 8465 (SD70ACe) runs a loaded coal train south on the Joint Line through Castle Rock, Colorado.

BNSF 7561 (ES44DC) leads a loaded coal train south on the Joint Line through Castle Rock, Colorado.

ATSF F7 311 leads 15 cars at 50 MPH on the Joint Line, south of Castle Rock, in 1951. Otto Conrad Perry photo from my collection.

A four unit EMD FT set leads a south bound freight, south of Castle Rock on the Joint Line. Otto Conrad Perry photo from my collection.

An EMD FT set leads fifty one cars at 25MPH, on the Joint Line south of Castle Rock. Otto Conrad Perry photo from my collection.

ATSF 5370 leads a southbound TOFC train near Castle Rock, CO in June of 1989.

CASTLE ROCK CO July 24 1982 — BN SD40-2s 7283, 7277 and another SD40-2 are tied down. The 7283 was built in March 1980. My photo.

BNSF 9215 (SD70ACe) leads a loaded coal train south on the Joint line as it runs through Castle Rock, Colorado.

Random chance lead me to catching this special move on the UP. SD70M number 3968 leads a brand new set of Stadtler EMU's bound for Caltrain in the Bay area. Looking very much out of place on the A... (more)

The Denver, CO to Amarillo (South Yard), TX manifest train grinds hard up the grade of the Joint Line as it passes through Castle Rock with BNSF 4705 leading.

A short manifest growls upgrade into Castle Rock, CO on the BNSF/UP Joint Line as the train continues its assault out of Denver for points south.

A rare sight catches BNSF 7529 (ES44DC) leading a long officer's special train south on the Joint Line through Castle Rock, Colorado.

BNSF 4322 (Dash9) leads a grain train through the S curve at Castle Rock, Colorado as it runs south on the Joint Line.