Sun-started Seattle-ites have been crossing the mountains in search of blue skies for years. While Lake Chelan is well-known in western Washington, it’s still a hidden gem for most people.The lake is surrounded by hills and is one of the deepest in the country. Families love the variety of watersports, such as boating, kayaking and swimming. When you’re done playing on the lake, head to one of the many wineries in the surrounding area.