WA also has easements by traditional access, but it seemed pretty limited and easy for property owners to avoid, when I was looking into it.
[1] https://app.leg.wa.gov/rcw/default.aspx?cite=8.24&full=true
If you can show that you've been using a specific path for years the owner of that path can lose rights to block access. This is why you see some land owners putting up no-trespassing signs and jealously guarding their land and access. They don't want to lose the ability to effectively control their paths. IIRC, this is a common law thing. It's a bit like trademarks in the sense that land owners need to guard their land otherwise they lose a chunk of it.
The squishiness here is I don't think there's a specified amount of time before the public easement is granted.
With private, the agreement is by - or between - private landowner(s).
With public, it's between every applicable private landowner, and the governing authority.
or you can make it a national park and put a surveyor's mark for people to come and visit.
TIL this is a real thing. I thought it was a HN thought experiment.
Per another comment, some of it at least is that many people really don't want hunting (or destructive off-road vehicles) on their land but have no problem with the occasional person taking a walk on a more-or-less established path.
Even in the UK, I've had an issue with something basically identified as an item of interest on an OS map and getting yelled at for sticking my nose in a gate.