Mary Lentzner is a first-generation Californian who was born in 1944. Both of her parents immigrated to the U.S. from Azores Island, Portugal, before they moved to California. Lentzner grew up in a ranching family and later became a cattle rancher herself. She sold her land to the East Bay Regional Park District in 2008. The land is located near Black Diamond Mines Regional Preserve in Antioch, and is part of an expansion and restoration project in partnership with the East Contra Costa Habitat Conservancy that includes the development of a future park currently referred to as Deer Valley. In this interview, Lentzner talks about her early life and memories of her family, the untimely death of her father when she was a child, moving to San Jose with her mother, how her interest in cattle ranching developed, buying her sister's ranch land in 1996 after her mother died, owning her own ranch, her decision to sell to the East Bay Regional Park District, and how she hopes her connection to her family history through ranching is remembered.