The Woodstock Music & Art Fair -- informally, the Woodstock Festival or simply Woodstock -- was a music festival in the United States in 1969 which attracted an audience of more than 400,000. Scheduled for August 15 -- 17 on a dairy farm in the Catskill Mountains of southern New York State, northwest of New York City, it ran over to Monday, August 18.

Where was the famous woodstock art and music festival held? Okie... think carefully first, then make a decision:
The relevant information to answer the above question is: Scheduled for August 15 -- 17 on a dairy farm in the Catskill Mountains of southern New York State, northwest of New York City, it ran over to Monday, August 18. So, the answer is on a dairy farm in the Catskill Mountains of southern New York State , northwest of New York City.