One of my favorites is a classic, now out of print book called The High Adventure of Eric Ryback. In 1970 the 17 year old young author set out to hike from Canada to Mexico, and in so doing became the first person to hike what would later be known as the Pacific Crest Trail.
Perhaps reading the hiking journeys of others will inspire you to plan some fall hikes as the weather cools down.
Happy trails!