OutreauOutreau is a commune in the Pas-de-Calais department in the Hauts-de-France region of France west of Boulogne. The river Liane forms the eastern border of the commune with Boulogne.WWW ville-outreau.frHistoryOutreau was the site of the Outreau trials of 2001–2004.Twin towns Eppelborn, Germany.