The fast local guys do this ride in about the same time as the Assault on Mt. Mitchell, maybe a little longer. The difference is the TdT has a few more miles, a bit more climbing, but comes back down to the start. The AoMM as you probably know finishes up on the mountain. The problem with the rides you mention is the constant traffic on US 441 through the Park. The BRP gets less than 10% of that traffic I would say. So 47 miles on the BRP with low traffic is really nice. If the weather is good, the TdT is a spectacular ride. Glad you signed up for it. Maybe we can do a "recovery" ride the next day.