The roughly 1 hour (2 hours if you leaving from Wailea) drive from sea level, follows a winding switch back that ends at 3055 m (10,023 ft). Try to arrive at least an hour before sunrise if you want a parking spot at the upper lot. I arrived even earlier as I wanted to get some shots of the night sky.
Yes that temperature gauge is accurate, it was 47f and that’s with out the high winds. More than a 25f difference compared to beach I had left earlier that night. Remember to dress warm! You might be standing out there for up to an hour.
With the full moon that night it was easy to see in all directions while still retaining some of the night sky’s stars.
There is also a nearby observatory that almost seems like it was light with day light rather than moonlight.
The best sunrises at this altitude happen when there are low lying clouds for the sun the highlight.