hadra trance festival 2026 takes place august 27 to 30 at plan d'eau de vieure in allier, auvergne-rhône-alpes, central france, on a 25-hectare lakeside site. the beating heart of the french psytrance scene and entering its 17th edition, hadra is organized by a non-profit association dedicated to promoting "utopies éphémères" (ephemeral utopias) with a 2026 theme of "aligning with the sun." this four-day event features an impressive lineup across 72 hours of non-stop music on multiple stages: ma