+dcrep Posted April 29, 2010 Share Posted April 29, 2010 (edited) I was hiking the Bright Angel Trail in the Grand Canyon, and looked for some non-PID marks along the way. This one had a nice view, from 4844 feet elevation along the trail. Unfortunately my camera failed to record the close-up shot of the disk. Edited April 29, 2010 by dcrep Quote Link to comment
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