I think he/she's an Oregon Ensatina.
The funny thing is that I totally thought I'd discovered a snake when I lifted a log and saw it's head! It's very lumpy, like a snake's, and not many salamanders seem to have that.
Here's another website with info and great pictures of these guys:
I guess I don't know much about salamanders, since I never expected to find one in my yard, in Multnomah County, nowhere near a body of water. I always thought they lived near rivers. Pretty cool! The beehive that's also in the wood pile is a little less cool.