Yeah, from what I understand, it’s common for that upper part to be closed.Buddy and I tried driving up it one March. The top 4 miles were blocked off due to high winds and snow. I remember coming over one slight hill about 3-4 miles from the bottom and the car was shaking from the blast of wind. It was ridiculous.
When we were out there, I had my 2016 WRX, and wanted to drive the road, but the upper part was closed on the day we wanted to do it.