And if you want to hike it, you've got the International Appalachian Trail... https://iat-sia.org/the-trail/

If you want to section hike it, its entire North American part is covered by the Eastern Continental Trail (ECT), which some people (very few, as in a tiny fraction of all A.T. thruhikers) thruhike it in a single calendar year.

https://en.wikipedia.org/wiki/Eastern_Continental_Trail