All-wheel drive conditions all the way to the top with a couple of spots where some attention is needed to avoid runoff gullying in the roadbed.

"2wd in most cases" indeed. no deep water bars (only ones are small and not a clearance challenge), potholes+ruts can be avoided or picked through without damage in a low vehicle. one water crossing of a shallow puddle. snow patches at the top are super soft, and I have now plowed through them so tire tracks should mean they're not meaningful, as the thin snow left will melt fast