Washington State Parks waives the Discover Pass fee on designated free days throughout the year, and June 6–7 is your chance to explore the Hood Canal corridor at no cost. Twanoh State Park (Union) offers swimming, picnicking, and shellfish harvesting. Potlatch State Park offers beach access and stunning tidal flats. Belfair State Park features a unique warm-water estuary. Dosewallips State Park in Brinnon sits at the mouth of the Dosewallips River on Hood Canal's northern reaches. A perfect weekend to discover or revisit these natural gems.