Photo By: Kevin Morgan

The longest Tunnel in the Tunnel District is Tunnel 17, which is 1,752 feet long, or roughly 1/3 of a mile long. The tunnel allows the tracks to leave South Draw, and connect with the open valley at Crescent, near Gross Reservoir. The westbound Zephyr is approach a clear (green) intermediate signal just east of Tunnel 17 on the approach to Crescent. Email Questions or Comments to the Webmaster. User Comments (0) No comments posted yet. Click Here to add the first one!

8 views 0 comments Tuesday, July 01, 2025 at 9:54:08 AM image date Location Information City or County and State Boulder County, CO Subdivision Moffat Tunnel (UP) Milepost or Control Point Plain to Crescent (MP 25.3 to MP 30.6) Train Information Railroad Amtrak Model P42DC Primary Unit Number AMTK 78 Paint Scheme Amtrak Phase 5b Symbol AMT5-30 Train Type California Zephyr (Amtrak) Photo Information Camera Make/Model Hasselblad / Mavic 3 / Mavic 3 Pro [L2D-20c] ISO 180 Flash Did Not Fire Focal Length 24 mm Shutter 1/2500 seconds Aperture f/2.8

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