Approximate location — plotted from published sources, not a site visit, and not a guarantee of access.
117,000-acre U.S. Fish & Wildlife Service refuge in the Altar Valley protecting semi-desert grassland, reintroduced masked bobwhite quail and pronghorn, and rich birding along Arivaca Cienega and Arivaca Creek. Occasional jaguar records from the contiguous border sky-island corridor. Open public refuge roads, National Recreation Trails at the cienega, and visitor information at refuge headquarters near Sasabe.