Spencer Butte! OK, I am not into the poson oak, but it is around of the surounding area in Eugene.  I enjoy Mt. Pisgah in the spring when it isn't as hot and there are more flowers.  The hiking around Mt. Pisgah is nicer than the trek up Spencer Butte.   As the summer heats up, heading up the MacKenzie river highway to hike along the river trail is nice.