Imagine a time when nearly all of San Francisco’s creeks flowed freely. Now, focus on a single survivor: Lobos Creek. It is the last above-ground stream within city limits.
Lobos Creek’s story begins high in the Presidio. Urban runoff and underground springs feed it. These springs originate near Mountain Lake. The creek then flows west for about a mile. It meets the Pacific Ocean between Baker Beach and China Beach. This location is about 5 miles west of downtown.
The name “Lobos Creek” comes from the Spanish term ‘lobo marino.’ This translates to ‘sea wolf,’ referring to the sea lion. Once, numerous creeks crisscrossed the San Francisco Peninsula. Diverse riparian habitats thrived. Now, many creeks are gone. Hayes, Yosemite, and Mission Creeks vanished. They were filled, paved, or diverted into storm drains. Only parts of Islais Creek and most of Lobos Creek remain. But even these have undergone significant changes.
In 1776, Spanish explorer Juan Bautista de Anza camped near Mountain Lake. He chose the site for the Spanish presidio. This marked the beginning of the Presidio of San Francisco. It was a strategic foothold in Alta California.
Following California’s statehood in 1850, settlers established farms and ranches. They sought fresh water sources. John H. Baker acquired land near Lobos Creek. In the early 1850s, he started a dairy known as Golden Gate Ranch. It was later called Baker’s Ranch.
As San Francisco grew, it needed a reliable water supply. The Bensley Company purchased water rights to Lobos Creek. They built flumes, tunnels, and pipes to transport water. This was a major engineering feat. Lobos Creek was almost 5 miles from the city. The company became Spring Valley Water Works. They dammed Lobos Creek’s mouth. A wooden flume stretched across Baker Beach’s dunes. Windmills lifted water to a storage reservoir. This supplied water to Fort Point and the San Francisco National Cemetery.
For many years, Lobos Creek was San Francisco’s primary water source. In 1862, the U.S. Army allowed the use of Mountain Lake as an additional source. By 1877, Lobos Creek provided 2 million gallons of water daily. The flume was nearly 23,500 feet long.
Nature photographer Ansel Adams spent his childhood near Lobos Creek. He described a vibrant riparian habitat. Watercress thrived and minnows darted. Dragonflies danced above the streambed. In spring, flowers bloomed. Fog created an eerie atmosphere.
In 1901, the city deemed Lobos Creek’s water unfit for drinking without treatment. However, the U.S. Army still considered it the best option. Between 1910 and 1912, a new pumping plant and treatment facility were built. As of 1992, Lobos Creek provided 60% of the Presidio’s water. Today, conservation efforts continue. Restoration projects aim to remove invasive plants. They also improve water flow.
So as you stand here, remember Lobos Creek’s resilience. It is a symbol of San Francisco’s natural heritage. It provides a glimpse into the city’s past and the ongoing efforts to preserve its precious resources.