Wacken Open Air returns to Wacken, Germany from July 29 to August 1, 2026, featuring headliners Def Leppard, Powerwolf, In Flames, and Savatage alongside 35 total artists. This legendary metal festival showcases a diverse lineup spanning metal, rock, hardcore, and thrash genres with international acts from the UK, Sweden, Brazil, Australia, Switzerland, Germany, and Norway. Notable performers include metal veterans Sepultura, Lamb of God, Emperor, and Running Wild, plus rising stars like Future Palace and Any Given Day. The four-day festival offers one of Europe's most comprehensive metal lineups for summer 2026.