Palo Alto Baylands Nature Preserve is the largest remaining tract of undisturbed marshland on San Francisco Bay, covering 1,940 acres of tidal and freshwater habitat with 15 miles of trails. Long altered by levees, dredging, and fill that supported an airport and golf course, the area lost much of its tidal marsh before restoration projects began improving habitat. The preserve is an important refuge for migratory shorebirds and supports sensitive species such as Ridgway’s rail and the salt marsh harvest mouse. Its history also reflects local conservation efforts, honoring advocates including Lucy Evans, Harriet Mundy, Emily Renzel, and John Fletcher Byxbee Jr.