Ice age trail - https://www.iceagetrail.org
Superior hiking trail - https://superiorhiking.org/
John Muir trail - https://www.johnmuirtrail.org/
Long trail - https://www.greenmountainclub.org/the-long-trail/
Pacific Crest trail - https://www.pcta.org/
Hayduke trail - http://www.hayduketrail.org/
Arizona trail - https://aztrail.org/