He might be over 13, really hard to judge that from a side view. He is a young deer, notice that his legs still seem normal to slightly long looking and he has no sagging belly> those are two key signs in field judging a buck. He is a great looking deer for a youngster, given a year or two he would be a true brute.

I do not know what kind of pressure you get in your area so he might not make it that long if it is heavily hunted.