Comment by izacus

> What's the right answer here?

Essentially, check before hand and if possible, use maps fit for purpose.

(E.g. Switzerland has nice public topo maps which are usually more accurate than Maps/OSM. They're available in SwissTopo app. The dedicated app also tends to show closed routes more accurately.)

And double check with local info boards about current state (many regions have websites or dedicated meterological organizations that will post recommendations and closed routes).