Running since 2009, Les 24 Heures Dément(es) is a musical marathon organised by the Internationales de la Guitare that transforms Montpellier's historic city centre into a live music trail. Starting at 10:00 on Saturday morning, concerts run continuously for 24 hours across a selection of iconic city venues.
The 2026 edition features an entirely female programme. All concerts are free of charge, subject to available capacity.