"A world-class day hike, my favorite part of the Appalachian Trail," says hiking guidebook author Tom Stienstra of the daunting climb up Mt. Katahdin. "The views are nothing short of spectacular." Thru-hiker Brian Robinson is partial to the notoriously steep Abol trail. Hike in September and October to gaze at brilliant fall foliage. While crossing the vast forest, be prepared for the company of moose, bears and bobcats.

Recommended by: Jeffrey Hunter, Roy Robinson, Brian Robinson, Tom Stienstra