Julia Lorraine Hill is an American environmental activist and tax redirection advocate. She is best known for having lived in a 200-foot (61 m)-tall, approximately 1000-year-old California redwood tree for 738 days between December 10, 1997, and December 18, 1999. Hill lived in the tree, affectionately known as Luna, to prevent Pacific Lumber Company loggers from cutting it down. She ultimately reached an agreement with the lumber company to save that tree.