not sure if its a jam or contest, depends of how many riders will come..

competition will be places in Belgrade skate park Novi Beograd - > http://maps.google.com/maps?hl=en&tab=wl 

facebook event -> http://www.facebook.com/event.php?eid=204683379565075

Open class

Prize pool depends of organizator and how many people will show up

theres gonna be camp arround skate park. hostel are cca 15 - 30 euros

skate / bmx / mtb / music all day all night!