A couple shows I'm going to are the Slayer, Lamb of God, Mastodon, Children of Bodom, Thine Eyes Bleed extravaganza on July 14th. On July 15th The Sword will be in town if you're into their stuff. Just a couple examples.
Also man, if you're looking to check out a couple local bands, check out my buddies Dimn, Xanther and End Theory. If you want, I can talk to either of them to find out what shows they have coming up. End Theory plays a lot of Seattle shows when Dimn and Xanther mainly play South Seattle (Tacoma) area shows.