Claire Murphy was conducting "avalanche mitigation" work on Valentine's Day when she and a colleague were caught in an avalanche. Ski resort officials announced her death Saturday.

Mammoth Mountain officials said the slide occurred during avalanche mitigation work following a significant Sierra Nevada snowstorm, during which about six feet of snow fell in 36 hours.

A Mammoth Mountain ski patroller who was injured in an avalanche last week has died, according to the resort. On Saturday, Mammoth Mountain Resort said ski patroller Claire Murphy died Friday night after she was caught in an avalanche on Feb.