Explore the best lake adventures in the Pacific Northwest. From the hard-to-reach alpine lakes of Washington state to the expansive Clear Lake and Lake Billy Chinook in central Oregon. The lakes in the Pacific Northwest are some of the most beautiful in the world, not to mention numerous. There are estimated to be over 1,400 named lakes in Oregon and somewhere around 8,000 in Washington. Plus, Idaho has an impressive 2,000 named lakes of its own!