Richard from Washington DC on 7/26/2018 12:48:49 PM:
It's tough to predict. Early October can be wonderful, or it can be wet. Hurricanes and low pressure centers moving up the coast can bring as much as a week of bad weather. Otherwise, it's likely to be cool and dry, almost cold in the mountainous parts of the GAP. There'll be leaves on the GAP too. You have to take your chances. It could be your greatest or worst bike ride. But normally, early October is a good time of year that part of the country.