Just southwest of Tucson, Arizona, the Altar Valley comprises approximately 610,000 acres of Sonoran desert grassland, some of the most biologically rich and ecologically threatened biotic communities in the world. Private ranches work side by side with federal, state and local agencies to manage the valley, which is the largest unfragmented watershed in Pima County, outside of the Tohono O’odham Nation to the west. It is a working landscape managed by families for generations — families who provide sound stewardship while functioning collectively as bulwarks against urban development and other threats that would forever alter this fragile social and ecological environment. These families collaborate with other organizations and citizens via the Altar Valley Conservation Alliance to solve problems and enhance the watershed through science, communication, and restoration project.

Learn more about our conservation efforts!

Become a Steward of the Altar Valley watershed through volunteering, partnering, and supporting the Alliance. Your work and generosity will contribute to solving problems and enhancing the Altar Valley.