Črne Njive and the surrounding area have developed into a true MTB trail center of regional importance. The Borovci MTB Club maintains around 28 km of trails of various difficulties. 

Most of the trails are green and blue, marked by gentle slopes and a good flow. The trails are suitable for all sorts of outdoor activities, so be careful – don't crash into a runner or a group of strollers!

http://faktujetu.si/crne-njive-mtb-trejli-in-enoslednice/