Have you gone up there to see how it is recently? Last time you asked, somebody replied, saying they've been clearing the route. So maybe it's doable now, at least partly?
You better take a chainsaw. I don't think they're done clearing up to Calamity yet. There's a bypass. Then you have thornville and slides before the disappeared Deer Canyon crossing. After that I don't know, but once you get to Big Tree you're good.
