The waters around the San Juan Islands are perfect for swimming… if you’re a seal. Most humans, however, are distinctly put off by the water temperature, which is cold even in the summertime. If you want an invigorating tonic after a sweaty ride, by all means take the saltwater plunge, but for sustained aquatics, you’ll probably want to visit one of the excellent recreational lakes in Moran State Park. Cascade Lake, Mountain Lake, and the Twin Lakes all have waterfront access for swimmers, and in the prime summer months – July and August – the water is just right for a good splash.
The Twin Lakes swimming area is especially appealing for those who like to get away from crowds, because you can only reach it by foot . For a map of the park, refer back to our discussion of Moran State Park and Mount Constitution under Bike Routes.