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Greg Stock

Greg Stock

Greg Stock is Yosemite National Park's first-ever park geologist, a researcher of rockfalls and glacial history who is also a rock climber.

Jun 24, 2026

23:47
But, um, you know, I mean, what, what's your kind of like grand take on, on the, the dangers of random rock fall in a place like, like Yosemite in terms of, of to climbers?
23:59
Well, I think it's good that climbers are, um, situationally aware.
24:04
And, you know, there's, there's not a lot of really obvious signs of, um, you know, imminent rock falls beyond just either avoiding climbing in areas that have experienced recent rock fall, because it is often the case that- There'll be multiple rockfalls from the same location over a period of weeks or months, sometimes even years.
24:24
Certainly if, like, if you hear any cracking sounds or something like that, you know, you should get out of there.
24:31
By the numbers, you know, there have been a few fatalities and a few more injuries to climbers from naturally occurring rockfalls, but, you know, by the numbers, it's not anywhere close to the number of injuries and fatalities from climbing-related accidents of one kind or another.
24:50
Um, so I don't think that climbers should be, like, especially paranoid about rockfalls, but I do think that they should be aware.
24:58
We should all be aware of the potential for rockfalls.
28:47
Yeah.

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