I used to jog a lot. I NEVER got a runners high.
Once you get the hang of it "jogging" can take little more effort than walking, so you're not going to have the same reaction. I can slowly jog or walk for a couple of hours and just feel pleasantly tired afterwards. I'm not knocking it, it's still good for you, and possibly better in the long term as there's less stress on joints (pun intended).