It is fun to be able to say that I slept in the crater of a volcano six years ago yesterday! It took us eleven hours to climb up. We were met with some hot chocolate at the top and then went down to set up camp in the crater for the night. I had on a pair of jeans, t-shirt, sweat shirt, and a heavy coat and still froze to death so DRESS WARM. It took us about 5 1/2 hours to climb down the next day. I was so sore for several days afterwards, but it was totally worth it for a once in a lifetime experience.