One of the many stack trains running along BNSF's Cajon Subdivision passes beneath the signal bridge at Hill 582 on a beautiful summer morning.

Westbound through Mormon Rocks on the Cajon Sub.

Working up main #2 at CP Walker, one of BNSF's newer 7100 class ES44C4's leads this eastbound up Cajon Pass.

Heading North up the Palmdale Cutoff on the Mojave Sub, UP 2468 struggles to lift this large Mojave Flyer up the steep 2.2% grade towards the Summit at Hiland.

High above the BNSF tracks near Cozy Dell, UP 2468 and 2 other SD60's grind up the Palmdale Cutoff leading the Northbound Mojave Flyer.

UP 7761 leads the ZBRLC down the Palmdale Cutoff near Davis Ranch as it passes the landmark Mormon Rocks.

Descending through Pine Lodge in Cajon Pass, a late westbound Amtrak train #3 is on the final leg of its cross country journey from Chicago to Los Angeles.

Passing the Cargill grain facility between Devore and Verdemont on BNSF's Cajon Sub, a late Amtrak train #3 is nearing its San Bernardino station stop and will then continue on to Fullerton and Lo... (more)

Between Canyon siding and Keenbrook in the lower reaches of Cajon Pass, a southbound Union Pacific manifest freight swiftly descends the grade through Swarthout Canyon on the ex-SP Palmdale Cutoff... (more)

In the late afternoon near Pine Lodge in Cajon Pass, a northbound Union Pacific manifest slowly works up the ex-SP Palmdale Cutoff as it leaves the siding at Canyon.

Just below Keenbrook at the foot of Cajon Pass, a northbound Union Pacific mixed freight bound for Roseville charges up the ex-SP Palmdale Cutoff.

Running as the sole head end power on a westbound UP manifest freight, a brand new ES45AH descends Cajon Pass near Pine Lodge on a very warm summer afternoon.

Working it's way down Cajon Pass on the Mojave Sub above Blue Cut, UP 9901 South is making track speed this afternoon down the Palmdale Cutoff.

BNSF 7135 leads this Westbound Kansas City of LA intermodal around Sullivan's Curve.

BNSF 7143 leads this eastbound stack train around Sullivan's Curve, as another BNSF westbound can be seen to the left and a UP southbound holding at Canyon above.