A reminder that the entire trail must be completed for it to count for the patch. Old versions of the list stated only specific sections needed to be hiked - that was changed years ago since what constitutes "terrifying" is a slippery slope. To make things easy as far as rules go, you now need to hike the entire trail. This has been true for years, but the question keeps coming up.
Hike the entire trail. Note you don't need to hike it in one go. You can do it in sections.