The Zagreb Trekking School has been organizing one of the most entertaining races on Medvednica for many years on Halloween. The Ghosts of Sljeme race in Zagreb is intended for young and old, although it takes place in the evening and is competitive in nature. The organizer establishes control points where points are collected, and we can compete in three categories: Casper, Ghost of a lady in a white dress for individuals, and Ghost of a lady in a white dress for teams. Casper is a race for adults with children and it is the shortest, and the lady in the white dress will chase the fitter runners. The popularity of Ghosts of Sljeme race in Zagreb is not only the attractive date and time of the race but also the masks worn by the runners, which bring them extra points. Book an apartment, room or holiday house in Zagreb, and plan colorful masks on the spookiest night at the Ghosts of Sljeme race. For a fun and active vacation in Zagreb, look for more information on the pages of the Zagreb Trekking School.