Whooohooo - 6 mile trail hike today and it feels like I could have gone further with no issues. One of my hiking friends has invited me to hike a certain 10 mile trail this fall in southern Indiana (it's in a national forest) and I don't think it's an unreasonable goal. If I can hike 6 miles on trails in 1:58 without even trying I think that 10 miles on a hillier trail in 4 months will be fine.