"Crater Lake was a place of mystery to the Klamath Indians. The Klamath Indians must have lived in the region as early as 7,700 years ago, because artifacts such as obsidian tools, spear throwers, and moccasins have been found beneath the Mazama ash layers to the north and east of Crater Lake. The Klamath Indians describe the catastropic eruption of Mount Mazama and the creation of Crater Lake in one of their legends. Their legend of a raging war between two great volcanoes, Mount Mazama and Mount Shasta, parallels the geological history of Crater Lake.
The spirits of the Earth and sky often came and talked with the people. Llao was the spirit of the Below-World who lived beneath Lao-Yaina (today known as Mount Mazama). Skell was the spirit of the Above-World. Llao often came up and stood on top of Lao-Yaina, and his head would touch the stars near the home of Skell. There was no lake then, just a hole through which Llao passed to see the outside world. One day, Llao saw Loha, daughter of the Klamath Indian chief, and fell in love with her beauty. She rejected him because he was ugly and was from the Below-World. He got angry and swore that he would take revenge on her people. He tried to destroy the people with the curse of fire. The Klamath Indian chief sought help from Skell.
Skell descended from the sky to the top of Mount Shasta. Skell and Llao were thundering and trembling the Earth, hurling red hot rocks back and forth to each other (from Mount Shasta to Mount Mazama), causing great landslides. A terrible darkness spread over the area for days. All spirits of Earth and sky took part in this battle, creating intense fear among the people. Attempting to calm the ferocious volcano gods and to make up for the sins of the tribe, two medicine men offered to sacrifice themselves and jumped into the pit of Below-World. Impressed by their heroic sacrifice, Skell fought even harder. He finally defeated Llao, driving Llao deep down into the Below-World. He collapsed the top of Mount Mazama to imprison Llao forever beneath the world. Skell wanted peace and tranquility to cover up this dark pit, so he filled it with the beautiful blue water."
Thanks JimSEA!
One of the indian villages in Alaska is on the other side of a large bay from a fjiord(Glacier Bay maybe?). The story was that the ice king wanted a bride and came into the village that used to be on the fjiord. So the villagers had to flee to their current homee.
Scientists have now found the remnants of the old village that had been covered by ice a thousand years or so ago.
IIRC the large subduction earthquakes in the Pacific NW from 400+ years ago can be found in the native stories.