Hill is best known for living in the branches of a 1,000-year-old redwood tree for 738 days between 1997 and 1999. She lived in the tree, nicknamed "Luna," to prevent loggers from cutting it down. Hill has brought international attention to the destruction of the world's last remaining ancient forests and is an active advocate for the sustainability, restoration, and preservation of life.
In 1996, Hill suffered a near-fatal car crash, where the steering wheel of the car penetrated her skull, taking her almost a year of intensive therapy before she was able to speak and walk normally. After recovery, Hill embarked on a spiritual quest that lead her to the environmental cause that opposed the destruction of the redwood forests in California.
Since Hill's the tree sit, she has become a motivational speaker, author and co-founder of the Circle of Life Foundation and the Engage Network. Additionally, she has been the subject of countless interviews, books and documentaries, including Butterfly and Tree Sit: The Art of Resistance.