Photo By: Kevin Morgan
 

The morning Zephyr passes in-and-out of the shortest tunnel in the Tunnel District. Tunnel 29 is about the same length as a single Superliner car. The train is just about to cross over South Boulder Creek under partly cloudy skies.
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Tuesday, October 13, 2026 at 10:07:47 AM
image date


Location Information
City or County and State
Boulder County, CO

Subdivision
Moffat Tunnel (UP)

Milepost or Control Point
Tunnel 29 (MP 36.4, 75 ft)



Train Information
Railroad
Amtrak 		Model
P42DC 		Primary Unit Number
AMTK 145

Paint Scheme
Amtrak Phase 3 (Heritage) 		Symbol
AMT5-12 		Train Type
California Zephyr (Amtrak)


Photo Information
Camera Make/Model
Hasselblad / Mavic 3 / Mavic 3 Pro [L2D-20c] 		ISO
100
900 		Flash
Did Not Fire

Focal Length
24 mm 		Shutter
1/160 seconds 		Aperture
f/2.8

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