Lifetime WA resident who's spent a lot of time /out/ For an experience unique to WA, without a lot of bullshit attached, I cannot reccoment Mt Ellinore Enough. (Pic Related)
https://www.wta.org/go-hiking/hikes/mount-ellinorAny REI will have a map available, and the WTA site even lists the number of map you need from green trails (#167 or #168)
Another recommendation is Lena Lake, located close to the same area.