The Golden Gate Bridge opened on 27 May 1937 with a pedestrian day that drew two hundred thousand San Franciscans onto its 2,737-metre deck, many convinced the span would collapse under their weight.
Chief engineer Joseph Strauss had designed a suspension bridge whose towers rose 227 metres above mean high water, tall enough that warships could pass beneath its centre span. International Orange, the paint color chosen in 1935, was meant as a temporary sealant but became permanent after architect Irving Morrow argued it harmonised with the bay's natural palette of rust hills and grey fog.
A san francisco boat tour golden gate bridge route departs Pier 43½ in Fisherman's Wharf and follows the northern waterfront past the Hyde Street cable-car turnaround, Fort Mason, and Crissy Field, where the bridge's southern anchor meets the Presidio bluffs. Most bay cruises pass directly under the span at the moment when deck traffic overhead becomes audible — the hum of tyres on steel grating, a sound engineers preserved in the 1985 seismic retrofit. West of the bridge the Pacific swell enters the Golden Gate strait, where tidal currents reach five knots during spring ebb cycles. Eastbound routes pass Alcatraz Island, a federal penitentiary from 1934 until 1963, and Angel Island, which processed 175,000 Chinese immigrants between 1910 and 1940.
San Francisco bay cruise routes also track the Bay Bridge's western span, a 1936 cantilevered structure replaced in 2013 by a single-tower suspension design after the Loma Prieta earthquake revealed seismic vulnerabilities. The original bridge carried the last transcontinental automobile traffic into the city, ending at the Embarcadero. Afternoon departures catch the fog bank that forms when marine air meets warm inland valleys, a microclimate unique to the Golden Gate's topography. Evening sailings time their return to the Embarcadero lights, which replaced the demolished Embarcadero Freeway in 1991 and restored visual access to the Ferry Building's 75-metre clock tower.
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