Great thread this, picking up lots of recommendations.

Just finished Born To Run, liked it a lot, especially enjoyed the descriptions of Barefoot Ted.

Starting The Wild Places by Robert MacFarlane next - recently read 'Wildwood, A Journey Through Trees' by Roger Deakin which I thought was great. Their writing styles seem very similar. A real pleasure to read.

As for non-outdoorsy books, I loved The Baroque Cycle series by Neal Stephenson, tremendous historical fiction (or science fiction??) spanning 1600-1700's.