Ya, I run solo mostly because it's a last second decision to go or I just don't plan far enough ahead. Made a couple friends at the Overland Rally so might try to organize some exploration trips near Castle Lake on Mt. St. Helens.
Someone posted Burley Mountain, you should definitely do it! Probably my second favorite peak you can drive to in the Gifford Pinchot. There are two ways up, one is pretty rough but fun, the other just a forest road. My .02 is to go up the rough one and come down the easy one.
Exploring the Pacific North West, one weekend at a time.