Ridge Running, by Kim Stanley Robinson

I used to live in Bozeman, MT.  We had mountains with hogsbacks and other features close by, and would climb on them.  Ridge Running is a story of three guys doing that.  One has had recent medical treatment that leaves him somewhat different mentally.  Well, it's a nice story, they have some tension but end up enjoying their time together, but the SF part is totally incidental, not even necessary.  It got nominated for a Hugo in 1985, as this sort of thing does.  It's nice, it's inoffensive, but not worth going out of one's way to read.  2 stars.