Glen Helen Amphitheater is on a completely different planet of big. A History That Reads Like A Greatest Hits AlbumGlen Helen Amphitheater has lived many lives, and every chapter is worth knowing. In January 2017, it returned to its roots as Glen Helen Amphitheater, and honestly, the original name suits it best. The Food Scene That Fuels The CrowdFueling 65,000 people is no small task, and Glen Helen Amphitheater takes the challenge seriously. Then there is Glen Helen Amphitheater, which tends to stay lodged in your memory long after the ringing in your ears has faded.