Abandoned Hiking Climbing Gear - Common?

[trailhound]

I recall a report on one of the Mt Whitney/Sierra Nevada boards. There was a full campsite found abandoned somewhere in the Sierra.  I think the tent had collapsed from wind or snow. No explanation was had.

Something as simple as a twisted ankle could cause someone to jettison gear and hobble out. Circumstances could prevent an immediate return to retrieve the gear. The owner just gave up on it.

I had the honor of being on a guided tour of Copper Canyon led by Charlie Callagan. He was the best, the very best.