We've had several delivery trucks and many cars get stuck because their GPS tells them to go down irrigation ditch access roads. Google probably uses those same old, outdated databases. There's plenty of roads on Google maps that are in the middle of farmer's fields.
Who knows where they get this stuff from.
Kind of like using the internet for finding stores. If it was ever there it will show up when you search. You go there and it's an empty field or a totally different business.
Nobody is cleaning this stuff up.
Garbage in, Garbage out. Most of the internet is garbage, but every once in a while you find something useful, like Mountain Buzz