![](http://www.alamy.com/thumbs/6/6084F95D-ED0C-43C3-8BC8-0059A99FAC69/E64PEE.jpg)
Steep grade sign at summit of Coal Bank Pass (10,640 m), US 550, San Juan Skyway, Colorado, USA
Size: 5616px × 3744px
Location: Coal Bank Pass, San Juan Skyway, Colorado, USA
Photo credit: © David Wall / Alamy / Afripics
License: Licensed
Model Released: No
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