Was told by the vet if he did not start lifting his leg before he was neutered, chances are, he never would....don't know how true that is...just thought it was interesting.
Depends on the dog. Most will be by 1-2 years old, but some never do and some will earlier. My adult male doesn't hike at all, but my adult female hikes! It's an individual thing. While your dog may start in the next year or two, he also may not.