In February 1959, a group of hikers died in the mountains. The events sparked theories both scientific and conspiratorial.

The conditions that drove the deadliest avalanche in California's modern history began to emerge days in advance, as a blizzard brewed after an unusually dry January in the Sierra Nevada. Citing rapid ...

Avalanche defined as a rapid snow mass flow down slopes. Forms when weak layers collapse under slab weight. Four types: slab, loose snow, wet snow, and glide avalanches. Triggers include heavy snow, ...

The story of how nine skiers were killed, and six survived, in the deadliest avalanche in modern California history. A 3-D model reconstruction of Perry's Peak area based on data from the United ...

The group of 15 backcountry skiers would have had only seconds to process the mass of snow heading toward them — traveling at as much as 100 mph — after one skier spotted it and shouted “Avalanche!” ...

Eight skiers who went missing after a Lake Tahoe avalanche have been found dead, authorities said, making the avalanche the deadliest in modern California history. A ninth skier who remains missing is ...