Yes! They used to take us on school trips up there (I wonder if parents still consent to that?!)
I don't remember it being particularly challenging, but it's still a great workout! And it's pretty cool scenery, too.
I went to the morning swim on Sunday when we were in town. It was pretty busy because they are still on winter hours and the tourists overlap the early bird locals. It still felt amaaaazing, though!
It sounds like you keep yourself pretty active! I live in downtown Denver and I miss having all that "stuff" right off my doorstep. DH asked if I would ever move back and I don't think so, though
At least not yet.