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07:01
will do
 
3 hours later…
10:07
It sounds to me like this is simply an information problem - she doesn't know what she's getting into. If she knew, she would conclude herself that this is something she doesn't want to do (because if this were the kind of thing she wants to do, she'd already be doing more things like it).
So you just need to inform her.
10:43
I'd add, that you should confide in your friend/her boyfriend. Since he invited her, he is responsible for her experience and he should also think about, if she is up to it or at least inform her enough. So it might not even be you who has to talk to her about it, only the one to voice your concerns and get the ball rolling.
 
10 hours later…
20:56
I agree that this is an information problem. Unfortunately, too many people will take information presented to them, think it doesn't apply to them, and disregard it with an "it'll be fine". The consequences for failure to comprehend what she may be getting herself into are very high and the lack of experience may indicate that the couple in question just don't realize how hard this trek will be or what the risks are.

Please accept I'm not disagreeing with your premise; I think you're spot on. I believe that it's not worth the risk of someone possibly ignoring what they're being told; t

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