2025-09-05 Horja Geopark Kaldera Toba Horja Geopark Kaldera Toba September 5 - September 7 Horja Geopark Kaldera Toba "Loka Global"
2025-09-11 Lake Toba Traditional Music Festival 5.0 Lake Toba Traditional Music Festival 5.0 September 11 - September 13 Lake Toba Traditional Music Festival 5.0