If you take Highway 4 really far east towards Murphys / Arnold its a very fun drive. Pick a nice summer weekday to just go cruisin' and you'll find its mostly a two lane road, one lane each way. Most of the drive is just long stretches of open road with very small turns and hills with quite a few places to pass slower drivers, but if you actually drive all the way to Murphys or Arnold you'll go through a nice winding road thats a ton of fun to drive on. I don't own a WRX so I don't know how it takes to the road but even in my Accord I had a ton fun. When I get a WRX I plan on taking a drive up there just to break the car in.