Yes, yes, yes: Mauna Kea is on the Big Island. We never made it up to the top the other times I was there so it never made it into the other posts about the Big Island.
But what to say about Mauna Kea? It is a different world, the top of the world. Technically, it is the largest mountain in the world. It makes Mt. Everest look puny.
It was shocking to go there. from a balmy 80 degrees to 34 degrees. It was truly spectacular though. And then I promptly got altitude sickness and fell asleep on the bus.