If you are marathon minded, the Ljubljana event takes place annually towards the end of October. There are a variety of races for professionals, enthusiastic amateurs, and those who feel inspired by the event.
If you don't want to join in, you can always find a vantage point and cheer the runners on - and there's lots of entrtainment around.
Equipment: Running shoes, shorts and shirt!
For spectators - a camera, loud voice for cheering.