Before I had peroneal nerve damage... I used to run 30 to 40 a week from high school all the way, off and on of course, to 25. I could run 2, I'm guessing in a lil over 13. I think for a fit bro anything around 1430 or 15 is excellent.
First of all, you are a nature dude. This I know, studies show that for runs outside vs runs inside serotonin release after, you know during endorphin release... is double that of inside.
My point is, theoretically you should be running 14 inside, and 15+ outside.
Second, you are not Pre. You Shawn Merriman types aren't known for endurance... I would imagine that right around 4, the shins probably hurt... depending how much weight you put on last cycle.
IMO, for a guy your size, that's excellent. It's funny though, I noticed and have heard others state similar things, once you regularly break 5 miles on a normal basis... 10 gets easy.