Crater Lake in Oregon is sacred to the Klamath. The lake was formed 7,700 years ago when volcano, Mount Mazama, erupted & collapsed. The caldera filled with water making it the deepest lake in NA (1,943 ft). Oral history tells that the eruption reflected the battle between Llao, a mountain spirit, & Skell. After the lake formed, the Klamath used the area as a vision quest site. They call the lake Giwas & it is here that seekers can become one with all creation & obtain their spiritual power.