White Mtns of NH is not trivial hiking (they did not bother with switchbacks; just straight up the mountain and straight down). I will wait on that sort of hiking for her. I'm beginning to age out of it myself.
She, like many dogs, will tolerate more pain than is good for her so I don't trust when she says she's reached a limit. Today was warm here in So Cal and clearly too hot for her paws. She went into my sling and was not happy about it but I am using a sling! She hates it! But it does help me as she's getting too heavy from me to carry for long.
I will do my best to keep her injury-free but there's always risk, I realize. My history is agility where growth plate closure is much discussed. But it's been a long time since participating in this sport.
I will read the article, @Jengosmonkey, so thanks for that.