Yellowstone Forever is a nonprofit organization headquartered in Bozeman, Montana, and the official nonprofit partner of Yellowstone National Park. Established in 2016 through the merger of the Yellowstone Association and the Yellowstone Park Foundation, the organization combines environmental philanthropy with educational programs to protect one of the United States' most important natural landscapes. It works in partnership with the National Park Service to raise funds for conservation, scientific research, historical preservation and visitor education. Through donations, memberships, corporate partnerships and educational activities, Yellowstone Forever helps secure resources for projects that preserve the park's ecological and cultural heritage for future generations.

The organization's work includes protecting wildlife, restoring trails and boardwalks, supporting scientific research, preserving historic sites and improving educational opportunities for visitors. It also funds initiatives focused on biodiversity, native species recovery, environmental sustainability and the protection of Yellowstone's geothermal features. Through educational programs, publications and learning experiences, the organization encourages people of different ages to understand the park's natural systems and cultural history. Its fundraising efforts support priority projects identified in collaboration with park officials, helping maintain Yellowstone's natural resources while improving visitor experiences. Yellowstone Forever relies on charitable contributions and partnerships to advance its mission of protecting and enhancing the park for future generations.