And here is the LA Times write-up -- An amazing story!

From latimes.com

Woman describes harrowing rescue from icy tunnel

Passersby rescue hiker who plunged through snowpack into icy waters in Sequoia National Park. Recovering from frostbite, she says she feels 'very, very lucky to be alive.'

The hard-packed snow atop Franklin Creek in Sequoia National Park appeared safe, but when Marcia Rasmussen, 51, walked across, it collapsed, plunging her into an icy tunnel with frigid water. For three hours, in freezing temperatures, she clawed at the frozen ceiling, her bare hands going numb and her body giving out before passersby found her.

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From the article:

Marcia Rasmussen runs in Sequoia National Park. She was training for an ultra-marathon when the accident occurred.