Foster City, CA

Foster City's lagoon is a neighborhood waterway and a working part of its drainage system. Stormwater flows into the lagoon and is pumped from there to San Francisco Bay. About five miles of channels pass homes and parks, with launch ramps at Boat Park and Leo J. Ryan Park. Sailboats, electric boats, and human-powered craft may use the water; gasoline motors are prohibited and speeds are limited to five miles per hour. The city raises the lagoon for summer boating and waterfront events, then lowers it in winter to leave room for storm runoff. Swimming and fishing share a piece of infrastructure that many communities would hide underground, making water-level management visible in everyday recreation. Foster City existed first as a reclamation project.

ATTRPatrick Nouhailler / CC BY-SA 2.0

T. Jack Foster and Richard Grant optioned low-lying Brewer Island in 1958. Two years later, California created the Estero Municipal Improvement District to finance reclamation, roads, and utilities; San Mateo County approved the master plan in 1961. Across six years, crews spread about 14 million cubic yards of sand and lifted the ground four to five feet. The excavation shaped a 218-acre lagoon holding about 425 million gallons, with 16.5 miles of channels and four bridges. Three years of filling, compaction, and utility installation came before the first completed homes. Incorporation on April 27, 1971, placed the engineered community under its own municipal government. Four bridges join nine original residential neighborhoods arranged around the lagoon. The plan put a town center and separate industrial areas near the U.S. 101–State Route 92 junction.

ATTRKing of Hearts / CC BY-SA 4.0

Most of the city's 3.79 square miles of land are now developed. This compact pattern puts office campuses close to residential streets. Technology and biotechnology companies form a substantial part of the commercial base, and Gilead Sciences maintains its worldwide headquarters on Lakeside Drive. The bay levee creates another engineered boundary beyond the office campuses, homes, and shops. A major project completed in February 2024 earned federal certification for protection from a flood with a one-percent annual chance and placed Foster City in FEMA Zone X. The levee also carries the local San Francisco Bay Trail. Leo J. Ryan Park is where these systems become community activity. Its amphitheater faces the lagoon, and the 2026 Summer Concert Series scheduled free performances there every Friday from July 10 through August 14.

ATTRCoolcaesar at en.wikipedia / CC BY-SA 3.0

The last concert opened the three-day Summer Days festival, which celebrates Foster City's birthday with local organizations, businesses, music, rides, vendors, and an inflatable-raft race. The library, City Hall, and park sit near the town center, creating a civic cluster within the residential plan. Along the bay, the levee trail gives a wider view of how the place works: Bay water outside the raised edge, pumps moving runoff from the lagoon, office campuses near the freeway, and bridges carrying neighborhood streets across the channels. From the amphitheater, a concert audience looks directly onto the same water that holds winter storm capacity.