Woodstock is coming up on its 50th anniversary, and while it doesn’t feel like it’s been that long since half a million people grooved in upstate New York, a golden anniversary is a great reason to look back at some nostalgic photos. From August 15 - 18, 1969 half a million people showed up to dance and groove in the mud while artists like Jimi Hendrix, Janis Joplin, and The Who jammed for hours on end.