Until the start of the coronavirus pandemic, which helped bring home baking to new areas of the country, sourdough bread was largely synonymous with one American city: San Francisco.

Even the San Francisco 49ers mascot – a staple at home games since the mid-1990s – is named Sourdough Sam. His favorite food, according to the team’s website, is “clam chowder in a sourdough bread bowl.”

But what connects sourdough and San Francisco? Fox News Digital reached out to the CEO of one of the city’s most storied bakeries to find out more about this culinary classic.

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“Sourdough bread is a type of bread made by fermenting dough using naturally occurring lactobacilli and yeast,” Dan Giraudo, CEO of Boudin Bakery, told Fox News Digital.

Boudin Bakery was founded in 1849 and celebrated its 175th anniversary this year. 

It is San Francisco’s oldest continuously operating company and is home of “the original San Francisco sourdough,” Giraudo said via email. 

The fermentation process behind sourdough, Giraudo said, gives the bread “a distinctive tangy flavor and chewy texture.” 

“He created a unique sourdough bread using the natural wild yeast found in San Francisco’s climate.”

Boudin Bakery has been making sourdough bread in San Francisco since 1849, Giraudo said, when a French baker named Isidore Boudin arrived in the city.

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“He created a unique sourdough bread using the natural wild yeast found in San Francisco’s cool fog climate, which gave the bread a signature flavor,” Giraudo said.

That specific wild yeast, known by its scientific name, “lactobacillus sanfranciscensis,” is what makes San Francisco’s sourdough bread so unique. 

Boudin Bakery has been making sourdough bread in San Francisco since 1849, using the wild yeast found in the city.  (Boudin Bakery)

“This wild yeast, combined with traditional techniques, led to a distinct variety of sourdough that became a culinary symbol of the city,” Giraudo said. 

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Boudin Bakery has been using the same “mother dough” sourdough starter since 1849, Giraudo told Fox News Digital.

A woman is all smiles as she eats clam chowder in a sourdough bread bowl in San Francisco. (iStock)

“This starter is carefully maintained and has been fed daily to preserve its natural flavors and wild yeast culture,” he said. 

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“This continuity and attention to tradition set Boudin’s sourdough apart from others, giving it a taste and texture that are hard to replicate.” 

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Today, Boudin Bakery has locations throughout California, including at San Francisco International Airport and a replica bakery at Disney California Adventure. 

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Its flagship location, at San Francisco’s Fisherman’s Wharf, offers tours. 

Boudin Bakery & Cafe’s flagship location is at Fisherman’s Wharf in San Francisco. (Boudin Bakery)

Boudin Bakery, Giraudo said, “is more than just a bakery. It’s a piece of San Francisco’s history.” 

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“Our journey from a small bakery to a renowned institution is a testament to our enduring legacy and commitment to quality,” he said.

It was five years ago this month that California closed off one of the lanes of the Richmond–San Rafael Bridge to allow bike and pedestrian access.  

The pilot project has now ended and Caltrans is recommending that the bike lane be closed for most of the week. But cyclists are digging in their heels to retain their 24/7 ride across the Bay Area.

On a cool, clear day like Saturday, the ride across the bridge was inviting enough, even if it wasn’t for the message they were trying to send. 

More than 100 cyclists made the trek from the Richmond BART station, across the span to Marin County. Nathalee Lomeli from Berkeley was a first-time bridge rider.

“It was beautiful.  It’s a beautiful day,” she said. “It was nice to see everybody come together in the community to support keeping this lane open and it was just a good time. Like, if it’s gone, I wouldn’t be able to experience it, know what I mean?”

But critics of the bike lane have long complained about how empty it appears while cars stack up during the weekday morning commute. Last year, a UC Berkeley study revealed how much—or little—usage was actually occurring.

“And so, right now, there are 21 bikers in the morning commute that are crossing across a three-hour time window.  And yet, there’s 18,000 cars during that three-hour window,” said John Grubb with the Bay Area Council, a business advocacy group supporting more traffic flow across the bridge.

“You know, I’m not sure what numbers they were expecting,” said Warren Wells, policy director for the Marin Bicycle Coalition.  “There was never any clear success or failure metric for this pilot. They never said, if we have this many people a day, we’ll keep it…if we have fewer than that we’ll remove it.”

So, the cycling community on both sides of the Bay turned out on Saturday to react to a proposal—endorsed by Caltrans, Marin County and the Metropolitan Transportation Commission—to move the barriers back Monday through Thursday, closing off access to bikes and once again providing a maintenance and breakdown lane.  

Wells said they can’t allow cars to use the lane because opening it to vehicle traffic would invite more drivers, which is a violation of state environmental laws. But he thinks that is the ultimate goal and doesn’t believe this current proposal is the end of it.

“It’s being framed as yet another compromise,” said Wells. “‘Oh, the compromise is that drivers get this four days a week and bikers, the half of you that are riding it on weekends, you guys get your lane.’ So, I expect a few years down the road, there’ll be some other compromise where the compromise we get is cut in half by another compromise. It doesn’t take Nostradamus to predict that.”

And even those who use it only on weekends aren’t thrilled about seeing it cut off during the week.

“I don’t see why they’re closing it, just to make a shoulder lane that’s not going to make traffic any better,” said rider Amanda Carson. “It’s just closing off access to the North Bay.  It’s really the only way you can get here from the East Bay.”

“To me, this bridge is all about the connection,” said cyclist Mary Norton. “And even if it’s ten cyclists a day going over, to have that access for reducing the number of cars–rather than just sit and be a break-down lane–is so important.”

It’s fair to point out that creating the bike lane did not remove a lane of traffic on the bridge.  

The lane had been shut down since the early 1970s when it was closed to make room for an emergency water pipeline to Marin County during a severe drought. It was never re-opened to traffic after that, instead used as a maintenance lane.  

The final decision for the new plan rests with the State’s Bay Conservation and Development Commission and those floating the proposal say they hope to see a decision sometime in December.

City Hall glowed pink and yellow as San Francisco rang in the Festival of Lights with dancing, feasting and glow-in-the-dark hula-hooping.

The Bhangra & Beats Night Market’s Diwali celebration — the city’s first official observance of the Indian holiday — drew thousands of people Friday to Battery and Clay streets in downtown, which crackled with fireworks, flickering clay lamps and grills cooking up fragrant South Asian fare.