BNSF 8021 (ES44C4) pulls a long string of auto racks up the grade to Castle Rock, Colorado.

BNSF ACe 9272 leaves behind Castle Rock, Colorado as it travels south on the Joint Line.

BNSF 9272 SD70ACe muscles a loaded coal to Castle Rock, Colorado.

BNSF ACe 9295 climbs the grade between Castle Rock and Larkspur on the southbound track of the Joint Line.

BNSF 9295 (SD70ACe) pulls a mixed freight through the S curve in Castle Rock, Colorado.

BNSF 9254 (SD70ACe) runs an empty coal on the northbound track of the Joint Line between Larkspur and Castle Rock.

BNSF 6113 (ES44AC) leads a loaded coal train south on the Joint Line between Castle Rock and Larkspur, Colorado.

With only a few minutes of sunlight left, BNSF 6170 (ES44AC) leads a loaded coal train through Castle Rock, Colorado.

BNSF 8117 (ES44C4) leads a short GEO train which has cars full of instrument to measure the track.

BNSF 6113 (ES44AC) leads a loaded coal train past the iconic rock formation that gives Castle Rock, Colorado its name.

BNSF ACe 9008 pulls a loaded coal train through Castle Rock, Colorado on the Joint Line.

BNSF 5632 (AC4400CW) braves the first snowstorm of the year as it runs be tween Castle Rock and Larkspur, Colorado.

BNSF 9728 (SD70MACe) leads a loaded coal train southbound on the Joint Line after passing through Castle Rock, Colorado.

A BNSF GEO train led BNSF 8117 (ES44C4) inspects a siding between Sedalia and Castle Rock, Colorado.

A short BNSF GEO train runs between Castle Rock and Larkspur, Colorado, measuring the track conditions as it runs on the Joint Line.