For its return to Clisson, Hellfest is planning to pull out all the stops, with a four-day extravaganza from June 15 to 18, 2023. The festivities kick off this Thursday, June 15, with a host of talented artists. So, who are the must-see performers on Thursday? Here are the 5 bands you won't want to miss at the 16th Hellfest in Clisson on June 15, 2023.