October in New Hampshire Suggestions

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I'm going to be in central New Hampshire for the month of October and would Love to do a multi day (2-10) trip or two. Preferably I'd leave from my parent's house in Bradford (Sunapee/Hanover area). I have a mountain bike so would enjoy off road, at least dirt or logging roads at some point. Perhaps a rail trail if there is one? Self supported camping would be the plan. Any suggestions?