Every year in June the "Sunnawendl'n" is celebrated in Grossarltal. It always takes place on the Saturday closest to June 21st.
This year on June 22, 2024 you can admire the burning of the bonfires at the summer solstice, when the "mountains in the Grossarl Valley are on fire". You can experience the whole thing very impressively from the Kreuzkogel. A big solstice celebration with bonfires and live music takes place on the Laireiteralm. The Panoramabahn Großarltal is also in operation in the evening on this day.