It was very hot the day I went (108). The walk is daunting but I really enjoyed it and would do it again just not while it's in the 3 digits! There are several sections in the Biosphere like the ocean, desert and rain forest. I was a little disappointed that we didn't walk through the rain forest but I think the bamboo has taken over. I really did enjoy it and the guide we had was fantastic. I'm sorry I can't remember her name.