The different surface explains a lot. I can respect that -- it is not like I find it impossible to bike ride because of the runners. It just made no sense to me that people would run in the bike lane when there appears to be a perfectly fine jogging lane next to it. When the park is closed to traffic I find no problem with it at all. My annoyance pertain to when there is only the couple of foot wide bike lane to use with cars speeding by. It would still be nice if everyone went in the same direction though.