In 1909, Berkeley built a municipal wharf at the foot of University Avenue for freight. It was modest. What came next was not. Starting in 1926, the Golden Gate Ferry Company extended the Berkeley Pier roughly 3.5 miles into the Bay, measured from the original shoreline. On June 16, 1927, auto ferry service launched, shuttling cars between Berkeley and Hyde Street Pier in San Francisco. US Route 40 funneled traffic down University Avenue straight to the ferry landing. For a decade, this was how the East Bay reached the city across the water. Then the Bay Bridge opened in 1936, and the ferry became obsolete within a year. The pier survived as a fishing spot, battered by storms, closed and reopened, repaired in the 1970s, and finally shut down in 2015. What remains is a truncated walkway pointing toward San Francisco like a sentence that never finishes.

Beginning in the late 1920s, the city's municipal dump occupied the shoreline west of the railroad tracks. For decades, Berkeley's garbage accumulated here - construction debris, household waste, whatever the city discarded. The landfill operated from 1961 to 1983, and by the time it closed, the accumulated refuse had created most of the dry land that the Marina now sits on. In the early 1990s, the city landscaped the former dump into a park, originally called North Waterfront Park. In 1996, it was renamed Cesar Chavez Park to honor the California labor leader. Today, the park is one of Berkeley's most popular open spaces, its grassy hills popular with dog walkers and kite enthusiasts, the Bay Trail threading along its edges. Few visitors think about what lies underfoot.

The actual marina was constructed in the late 1930s as the Berkeley Yacht Harbor, a Works Progress Administration project built alongside the nearby Aquatic Park. It rose just west of the West Berkeley Shellmound, an ancient Ohlone site. During World War II, the Navy commandeered the yacht harbor to build tugboats, swapping sailboats for wartime industry. After the war, recreational sailing returned, and today the marina shelters hundreds of boats whose masts form a swaying forest visible from Interstate 80. Less remembered is the heliport that operated from 1961 to 1974 on the north side of University Avenue. SFO Helicopter Airlines ran turbine-powered Sikorsky S-61 and S-62 helicopters from there to San Francisco and Oakland airports - a commuter air service that vanished as quietly as it arrived.

In January 2024, the California Water Boards sent Berkeley a letter that complicated the park's cheerful narrative. The board required the city to test for radioactive substances potentially buried in the old landfill beneath Cesar Chavez Park. The concern centers on waste from aluminum extraction - processing bauxite ore can leave behind heavy metal contamination, and Uranium-235, a byproduct of that process, was flagged as a potential presence. Heavy metals do not biodegrade. They persist in soil and water, accumulating through the food chain. The investigation is ongoing, a reminder that the land Berkeley built from its refuse carries a longer memory than the park's landscaping suggests. Beneath the kite-flying and the dog parks, the dump is still the dump.

None of this history is visible from the Marina on a clear afternoon. What you see is the Bay, enormous and glittering, with San Francisco's skyline stacked against the western horizon and the Golden Gate Bridge catching the last light. Kayakers launch from the harbor. Windsurfers and kiteboarders exploit the afternoon gusts that funnel through the Golden Gate. Charter boats head out for halibut, striped bass, salmon, and Dungeness crab. The Berkeley Bay Festival draws families each year to celebrate the water and the organizations working to protect it. Walking the Bay Trail here, with the wind off the Pacific and the city at your back, it is easy to forget that everything you are standing on was once either underwater or unwanted. That forgetting may be the Marina's greatest achievement.