The closest I know of are the Olympic hot springs over off the Elwa.

Beware of the indigenous Olympic mountain hippies though.

You can usually find them here during the rutting season.

Heres a link olympic hot springs
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With the population ballooning out of control, there
are bound to be more and more fishermen clogging up our rivers. All of
these fishermen have one thing in common: They come to the Olympic
Peninsula seeking solitude.”
Pat Neal