In college I did, but now I'm not really in an area where I can.  Dude, they had the best trails behind the school.  I remember once running when it had just started snowing and as you round a bend it opens up into a huge meadow.  Anyway, there were like 2 black tail and they jumped a barbed wire fence.  It sounds hokey now, but it was sweet.  Man I miss it.  It's so relaxing.