88.  Crater Lake, Oregon

Crater Lake is a mountain lake in the south-central section of the state.  It’s the main attraction at the aptly-named Crater Lake National Park.  It was created almost 8,000 years ago when the volcanic Mount Mazama erupted and formed a caldera that was slowly filled with rainwater and snowmelt.  

Crater Lake has a diameter of almost six miles.  It is well-known for its significantly deep blue color and its noticeable clarity.  The clarity is due to its being cut off from incoming rivers and streams.  The visibility is reported to be between 90 and 100 feet.  Sunlight penetrates the lake as far down as 400 feet.  With a depth of 1,943 feet, it’s the country’s deepest lake.

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