We hikers like going places that don't have addresses.
One of the "other trails" I deal with has parking locations that don't have assigned addresses, sometimes off of game land roads that don't have assigned names - and when the road names are assigned by the local government, the Google Maps folks don't seem to pick up on them (must be low priority area).
I recently heard of http://what3words.com/ as a way of substituting words for coordinates that are easy to mess up for many folks. Apparently this has been officially adopted for locating yurts in Mongolia.
Translating the three.word.string at least for the moment seems to require live connectivity. So it may be a better way for now to communicate trailhead addresses rather than, say, shelter sites and water sources.
Any thoughts about this new concept?