Discovering the Crystal Springs Feed: A Comprehensive Guide
The Crystal Springs Feed, a vital water source for the San Francisco Peninsula, is a natural wonder that deserves exploration. This guide delves into the history, significance, and ecological aspects of this remarkable waterway, providing a well-rounded understanding of its role in the region's ecosystem and culture.
Understanding the Crystal Springs Reservoirs
The Crystal Springs Feed comprises two reservoirs, Crystal Springs Upper and Lower, situated in the San Mateo County, California. These reservoirs, created by damming the Crystal Springs Creek, serve as the primary water source for the San Francisco Peninsula, supplying water to over 2.4 million people.
Historical Significance
Construction of the Crystal Springs Dams began in 1887, with the completion of the Lower Reservoir in 1888. The Upper Reservoir was finished in 1925. The dams were built to harness the power of the Crystal Springs Creek, providing water and hydroelectric power to the growing San Francisco Bay Area.

Ecological Importance
The Crystal Springs Feed plays a crucial role in the region's ecology, supporting a diverse range of plant and animal species. The reservoirs provide habitat for various fish species, including the threatened California freshwater shrimp and the endangered California red-legged frog.
Wildlife and Plant Life
The Crystal Springs Feed is home to a rich array of wildlife, including bald eagles, great blue herons, and various species of ducks. The surrounding area supports a diverse range of plant life, with over 500 species of plants, including the endangered San Francisco lessingia.
Recreational Opportunities
While the Crystal Springs Feed is primarily a water source, it also offers numerous recreational opportunities. The Crystal Springs Regional Trail, a 12.5-mile multi-use trail, winds along the reservoirs, providing scenic views and access to the surrounding wilderness. The trail is popular among hikers, bikers, and horseback riders.

Wildlife Viewing and Photography
The reservoirs are a haven for wildlife viewing and photography. Bald eagles can be seen fishing in the reservoirs, and the surrounding hillsides are home to various species of wildflowers, making it an ideal spot for nature photography.
Preservation and Conservation Efforts
The Crystal Springs Feed is a vital resource that requires careful management and conservation. The San Francisco Public Utilities Commission (SFPUC) has implemented various programs to protect and preserve the reservoirs and their surrounding ecosystems. These include habitat restoration, invasive species removal, and water quality monitoring.
Educational Programs and Public Outreach
The SFPUC offers educational programs and public outreach initiatives to engage the community in the preservation of the Crystal Springs Feed. These programs include guided nature walks, school field trips, and community events, fostering a deeper understanding and appreciation for this vital water source.

Visiting the Crystal Springs Feed
Visiting the Crystal Springs Feed is an excellent way to connect with nature and learn about the importance of this vital water source. The Crystal Springs Regional Trail offers numerous access points, providing visitors with ample opportunities to explore the reservoirs and their surrounding ecosystems. Whether you're a hiker, a wildlife enthusiast, or simply looking to connect with nature, the Crystal Springs Feed has something to offer everyone.
| Total Capacity | Total Surface Area | Maximum Depth |
|---|---|---|
| 123,000 acre-feet | 1,300 acres | 200 feet |






















