Okay let's talk about discongruency in titles, starting with, what else. Brokeback Mountain. When I think of mountains, I often think about the Continental Divide, which is like the "spine" of the Americas. The Continental Divide is typically the highest region of the Continent, where rivers run in opposite directions to the seas. So, Brokeback Mountain presents an image of discongruency, the spine of the continent which is broken. Brokeback also connotes weakness, while mountain connotes strength.
It is interesting that in Central Wyoming, there are actually two Continental Divides, one over near the Bridger/Teton ranges of the Rocky Mountains, and another further to the east. (Now all of you geologists feel free to come in here and elaborate, correct, whatever) Between them is a high plateau, the "Muddy Gap" and the Wind River Valley.