Berkstok (BERKSTOCK) festival is organized on the pattern of the legendary Woodstock rock. It was held in 1998 in Berkovitsa, Bulgaria, about 80 km from Sofia. The festival takes place since 2005 when was opened by the legendary Scottish punk band The Exploited. In Berkstok, took place for the first time in 1998 with participation of BTR, Vladimir Totev, Kamen Amuso and others. Over the years at Berkstok sang more than 150 groups, including Babyface Clan, Korozy, Poduene Blues Band, D2, ink, Karizma, Zornik. On Berkstok stage sang Joe Lynn Turner and Alcatraz with Graham Bonnet.