This surprises me because mountain lions have extremely sharp claws! With one swipe they could have ripped your tent from stem to stern! Since they evidently (and surprisingly) kept their claws retracted the whole time, I suspect they might have been a couple of young ones playing games (think half-grown kittens, but of course much larger).

Did you report this to the rangers? What did they say?

Did you turn on your flashlights?
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May your trails be crooked, winding, lonesome, dangerous, leading to the most amazing view--E. Abbey