I mapped a route from Sacramento to Kirkwood on rt 88 this past February.

Then I followed the GPS instead. It took me up 50 past Placerville up the mountain to a right on "Emigrant Trail (alt rt 50)"
where in winter there is usually 10 feet of snow. After 2 signs to turn around I came to this sign:

Your GPS is Wrong, Turn Around Now I did & used paper maps.

There was no snow but on my return weeks later 5 feet were on that road.
LOL