hi
i'm keith and i know exactly wher your hurting it used to happen to me, sometimes it still does when i run over 7miles. The muscle at the front of you shin is used to lift your foot up, thats why running on hills makes the burn even greater, sorry i mean more painful,

. What I did, and it worked for me was I started training that muscle. Put a reasonable light weight on your toes, the lift your toes and foot towards your shin until you can't move them anymore, then lower your foot and repeat, because you are trying to inprove stamina go for high reps and 3-4 sets each foot, it's easier if you sit on a bench or chair because you can reach down with your hand and balance the weight to stop it falling off. I hope this is of use to you.