Elevation benchmark at <a href="https://en.wikipedia.org/wiki/Black_Rock_Canyon_National_Park" class="extiw" title="w:Black Rock Canyon National Park">Black Rock Canyon National Park</a>, located at one of the overlook points.
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/44124372247@N01">Jeff Kramer</a> from Austin, United States
CC BY 2.0
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