Nothing Keystoney at all at WP - nothing super technical or super steep. That said, all of the singletrack on the mountain and in the valley is still pretty fantastic. A 4" bike is about all you'll need. If your son hasn't had the opportunity to get out on the DH bike yet, it could be a good place to break it in and get used to it. Nothing to technical, but you can achieve warp speeds on the "downhill" trail there. The riding at Winter Park would be accurately described as lift assisted XC.honkinunit said: