Treasure Island, California

Treasure Island, California is an artificial island located in the San Francisco Bay between San Francisco and Oakland. Constructed in the 1930s for the Golden Gate International Exposition, the island served as a naval station for decades before transitioning to civilian use. Today, it is a residential neighborhood of San Francisco with ongoing major redevelopment projects and offers iconic views of the San Francisco–Oakland Bay Bridge and the city skyline.

History

The island was built by the United States Army Corps of Engineers using material dredged from the bay during the construction of the San Francisco–Oakland Bay Bridge. It was originally named for the novel Treasure Island by Robert Louis Stevenson. The Golden Gate International Exposition was held there in 1939 and 1940, featuring attractions like the Tower of the Sun and intended to celebrate the newly completed bridges. Following the exposition, the United States Navy took control of the island, establishing Naval Station Treasure Island which became a major processing center for sailors during World War II and the Korean War. The base was officially closed in 1997 under the Base Realignment and Closure process, and jurisdiction was transferred to the City and County of San Francisco. The island's history includes its use for the Panama Pacific International Exposition of 1915, though that event was held on different landfill in the Marina District.

Geography and climate

The island is situated in the central San Francisco Bay, adjacent to Yerba Buena Island to which it is connected by a causeway. Its terrain is entirely flat, having been constructed from bay mud and sand. The climate is characterized by the typical Mediterranean climate of the San Francisco Bay Area, with cool, foggy summers moderated by the Pacific Ocean and mild, wet winters. It experiences consistent westerly winds, a feature famously documented by the National Oceanic and Atmospheric Administration. The island's location provides sweeping vistas of landmarks like Alcatraz Island, Angel Island, and the Berkeley Hills.

Demographics

As of recent estimates, the population is approximately 2,500 residents. The community is diverse, with a significant portion of residents living in former military housing. The population is projected to grow substantially due to the large-scale Treasure Island Development Project overseen by the Treasure Island Development Authority. Demographic data is tracked by the United States Census Bureau as part of San Francisco County. The island also has a small community of artists and hosts several annual cultural festivals that draw visitors from across the Bay Area.

Government and infrastructure

The island is governed as part of the City and County of San Francisco, falling within Supervisory District 6. Primary infrastructure management falls under the San Francisco Public Utilities Commission and the San Francisco Municipal Transportation Agency, which operates the 108 Treasure Island bus line connecting to the San Francisco Bay Ferry terminal. The San Francisco Police Department and San Francisco Fire Department provide emergency services. A major redevelopment plan, involving entities like Wilson Meany and Lennar Urban, aims to add thousands of housing units, improve seismic safety, and add new parks and commercial space, requiring coordination with agencies like the California Department of Toxic Substances Control due to historical contamination.

Culture and recreation

The island is home to several annual events, most notably the Treasure Island Music Festival which has featured acts like Beck and The National. The Treasure Island Flea Market was also a popular monthly attraction. The Navy Memorial Museum historically operated on the island. Recreational activities are centered on the perimeter of the island, which features a public promenade with panoramic views of the San Francisco skyline, the Bay Bridge, and Mount Tamalpais. The Treasure Island Sailing Center offers classes and boat rentals, taking advantage of the consistent bay winds. The island's cinematic landscape has made it a frequent filming location for movies and television shows, including productions for Netflix and Marvel Studios.

Category:Artificial islands of California Category:Neighborhoods in San Francisco Category:Former United States Navy bases