I'll second the mention of Bull of the Woods, although the last time I was there we climbed the Geronimo Trail, and it was steep. Wish I'd had a great site like this to review before I picked that route!
Also, there are lots of good hikes in the Olallie Lake basin, but be prepared for major mosquito attacks.
I think it's useful enough and close enough to a primary trail that it won't vanish. It was pretty easy to follow a couple years ago anyway...