ColoradoRailfan.com Contemporary Railfanning in Colorado
Railroad photograph
Photo by: Kevin Morgan
AMTK 203 and AMTK 81 lead the Zephyr west at the base of Big Ten Curve. In the distance (at the top), you can see the mainline at Eisele (Clay), where the Zephyr will be in just a few minutes.
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Monday, June 08, 2026 at 09:44:52
image date


Location Information

City or County and State
Arvada, CO

Subdivision
Moffat Tunnel (UP)

Milepost or Control Point
Big Ten Curve (MP 19.5 to MP 20.2)



Train Information
Railroad
Amtrak 		Model
P42DC 		Primary Unit Number
AMTK 203

Paint Scheme
Amtrak (Special) 		Symbol
AMT5-07 		Train Type
California Zephyr (Amtrak)

Photo Information
Camera Make/Model
DJI / Mavic 3 Pro [FC4382] 		ISO
100
886 		Flash
Did Not Fire

Focal Length
70 mm 		Shutter
1/1250 seconds 		Aperture
f/2.8