Yeah, that's the first thing I thought when I read bocastephen suggest the OP "arrive at the summit at least 45-60 minutes before the sun goes down." That seems like a bit much unless you are really comfortable hanging out in a low oxygen environment in freezing temperatures. I thought 20 or 30 minutes before sunset was more than enough time to take a good look around enjoy the views. But that's just me...although my wife who is not a fan of the cold was barely out of the van for 5 minutes before she was ready to head back down. lol That said, we both really enjoyed the Hawaii Forest & Trail Summit & Stars tour. The star gazing party was quite a thrill...the last time I saw so many stars I was in the planetarium.