Lobos Creek is a perennial stream located in the southwestern corner of the Presidio of San Francisco, California. It is the primary source of potable water for the Presidio community and represents one of the few remaining free-flowing perennial streams within the city limits of San Francisco.
Geography and Hydrology
The creek is fed by a shallow groundwater aquifer located beneath the Richmond District of San Francisco. This aquifer consists of rainwater that has filtered through the city's extensive sand dunes. The creek flows approximately one mile westward through the Presidio’s coastal dunes before discharging into the Pacific Ocean at the southern end of Baker Beach.
Water Usage and Infrastructure
Lobos Creek has historical significance as a critical water source for the city. In the mid-19th century, it was the site of San Francisco's first major water system, providing water to the growing population via a wooden flume that ran along the city's northern coastline. Today, the Presidio Trust manages the creek's water, which is treated at the Presidio Water Treatment Plant. This facility provides approximately 1 million gallons of water per day to residents, businesses, and landscaping within the Presidio.
Ecology and Restoration
The Lobos Creek Valley contains rare coastal dune and riparian habitats. The area is subject to ongoing ecological restoration efforts led by the National Park Service and the Presidio Trust. These efforts focus on the removal of non-native invasive species and the reintroduction of native flora, such as the Franciscan thistle (Cirsium andrewsii) and the San Francisco lessingia (Lessingia germanorum). The creek and its surrounding vegetation provide a habitat for various bird species, amphibians, and native insects.
Public Access
While the creek's immediate riparian corridor is protected to preserve water quality and sensitive habitats, public access is provided through designated boardwalks and trails. The Lobos Creek Valley Trail allows for observation of the dune restoration and the creek’s terminal flow toward the Pacific Ocean.