WARNING: Too much photos! I am not responsible if the forum crashes!
Finally, you've been waiting for this, the Real Canyon Locations by Geography!
These maps contain what we see from the canyons and city textures (the one which appears to be in the front is written):
Devil's Creek Pass:
Gold Valley Run:
Lofty Heights Downhill:
And now, the map:
I will not upload in-game screenshots, but if you wanted to see, go play the game. I did not include the real Petersburg Lake shape. And don't even try to correct my Lookout Point's location, there wasn't much space left. EDIT: Goddammit, in the Lookout Point, it says Palmont City near Mystery City, it is actually Mystery City, I'm gonna replace the picture. EDIT2: Replaced Lookout Point picture.