Abandoned Hiking Climbing Gear - Common?

[Kauri]

When we first hiked Pothole Canyon, we did the hike with Charlie Callagan from the NPS, and we came across a large gear pile on the long bypass of the large dryfall. I recall that, given the setup, Charlie thought someone had probably had to camp there for the night unexpectedly (no camping gear but a small rock wall/shelter had been built) then had left their gear to get back to the road more quickly. We packed everything out, and I'm guessing Charlie disposed of the gear since it was so old at that point. He also sounded interested to figure out what had happened, though of course we don't know if he was able to do this because that would have been private information.

I would guess the folks at the NPS might like to know about these gear piles, both to remove them as trash and also to confirm that they aren't associated with a known missing hiker. But that's just my guess.

Dazed, which canyon did you hike that had the dryfall?
Depending how you're counting canyons, two south of Trellis could be what I'm calling Tiger Stripe Canyon:
http://kaurijacobphotography.yolasite.co...lMarsh.pdf
or what Steve Hall calls Cottonball Marsh Canyon:
http://kaurijacobphotography.yolasite.co...Canyon.pdf
(Not sure why the TOPO map isn't showing up in this trip report, sorry about that!)