The park is largely evergreen forest with trails around the lake. Annual average rainfall is 35 inches. The lake's origin is volcanic, and is believed to have been formed as a "Maar" volcano. This type of volcano is the result of hot lava or magma pushing up near the surface of the earth and then coming into contact with underground water. This is thought to have resulted in a large steam explosion, leaving a crater that later formed a lake.
| | • Cedar
• Douglas Fir
• Hemlock
• Alder
• Apple
• Cherry
• Maple
• Oak
• Daisy
• Lupines
• Berries
• Ferns
• Moss or Lichens
• Thistle
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