there are a couple places near coos bay. i rode winchester trails in the rain about 3 weeks ago. staging area right on 101). blue ridge trails is another local spot, but we didn't make it there. winchester is pretty rooty and foresty. i loved it, and so did my pretty much beginner companion on her ttr125l. i spent most of my time in 1st gear. maps are available from the honda shop in coos bay, and probably other places too. or y ou can download one online. i forget where i found it, but if you search the internet for winchester ohv trails, you'll probably find it.
there's probably 40-50 miles of trails at winchester, maybe more. most of it narrow, damp, rooty, twisty, and fun.
-mw