[pier25]

You don't have to that far. In Mexico there are plenty of remote communities as well. They don't get their mail delivered though.

[davidw]

They are all quite accessible via roads, but there are places in SE Oregon and northern Nevada that are very far from anything. ~2 hours to get to a town with a supermarket and medical center.

[peckrob]

Alaska has lots of places that are only reachable by air or by extremely difficult overland routes that may only be passable during certain times of year.

Supai, Arizona [0] is only accessible by helicopter or an 8-mile hike from the nearest road.

[0] https://en.wikipedia.org/wiki/Supai,_Arizona

[sib]

And it's worth every bit of the journey to see the waterfalls.

https://fernweh.photo/2016/11/19/supai-arizona/

The helicopter "pad" and the hiking trailhead are themselves many miles from the nearest town. Supai is often claimed to be the most remote town in the 48 contiguous states.

[twobitshifter]

Even whole regions of the world like Zomia function without national governance. https://en.m.wikipedia.org/wiki/Southeast_Asian_Massif#Zomia