Well, actually, I do ride in the heat and don't like it. But with respect to Crystal Lake, there is no shade whatsoever for the hardest most extended portion of the climb. AND, there is no water once you get to the top (and being in good shape does not mean you can't get overheated). And, I HAVE climbed it in 90+ degrees with no breeze (Bob remembers that ride I'm sure, as I wanted to kill him). So, yes, I AM going to ride elsewhere.
I'm merely suggesting to my friend that if he wanted to save this ride for a cooler month, he's welcome to come join me.