As far as I know, we've gone back and forth over the past several years, probably because of traffic control and neighbor relations issues: when you have 2800 riders (again, this year, we've been told) on small country roads, you need to pay attention to community concerns. Two years ago, as I recall, the 33 hilly ride was routed back on the trail for the last 2 miles or so. However, I think many riders stay on the road and come back to the park via River Road and the front entrance.