After entering Olympic National Park, we stopped for a bite to eat at the venerable Hard Rain Cafe and Mercantile, which had pretty good burgers, an RV park, and a few souvenirs and gift shop items, including Hard Rock Cafe spinoff t-shirts.  Here they told us that the Hoh River Valley receives an average of over 140 inches of rain annually, compared to only 36 inches for Seattle, making it the rainiest spot in the continental United States.