Groezrock is an annual music festival that takes place in Meerhout, Belgium. It started out as a small rock and pop festival with a few hundred people attending, but has evolved into a large punk rock/hardcore festival, with attendances now exceeding 30000. Since 2003 there have been stages in 2 marquees. The second stage, Back-to-basics-stage, is reserved for more hardcore oriented bands. Since 2006 the festival has taken place over 2 days, and still has two stages.