Ditto on Kukanuska. I climbed there a couple times when I lived in MT. Good crag.
Long trad routes in the B-root. Mill Creek Canyon and Blodgett Canyon. Mostly Blodgett. South Face of Flathead Spire (My Mom's Muscle Shirt, 5.10 IV). One of the best IV's in the world. July will be too hot unless you hit it real early.
Best bet for alpine / long routes that time of year is to go up to the Bugs. Only a few hours drive from there. Mountaineering in Glacier Park also. Technical rock is way choss and not worth your time but some classic mountaineering slogs and scrambles. Cool place. Have fun. Eat Huckleberries, don't get eaten by bears.