In the Soča Valley we have Music festivals, Sport festivals and Culinary festivals.
From the Music festivals the Metaldays (http://www.metaldays.net) is the most famous; ten thousands of Metal fans overflow Tolmin and surrounding and for a week the Valley is black, loud, very happy and filled with a lot of fun. There are also the so called Punk Rock Holidays, the Reggae festival and Sajeta, were a diversity of artist present themselves.
The Sport festivals are the Hiking festival on the end of september and the Soca-outdoor festival (http://en.soca-outdoor.com) were all outdoor sports are professionally organized.
The Culinary festivals are the Autumn delicacies in oktober, the Jestival (food & art) also in October and the Soca-trout festival in september.