Drive north on 101 past the Tanforan curve this summer and the hillside letters look wrong before you can say why. The shape is right. The size is right. But the color is off, and it takes a second to realize the word "SAN FRANCISCO" has gone dark blue while "THE INDUSTRIAL CITY" still glows white against the hill. If you have lived in South San Francisco long enough to stop noticing the sign at all, this is the summer it gets your attention back.
The city repainted its landmark hillside letters this June, and the choice of which words get which color turns out to be the most honest thing South San Francisco has said about itself in years.
What actually happened on the hill this summer
In early June 2026, about 75 volunteers climbed Sign Hill and repainted the concrete letters that spell out "SOUTH SAN FRANCISCO THE INDUSTRIAL CITY" in red, white, and blue to mark the 250th anniversary of the United States. Genentech, the biotech company founded in and still headquartered in South San Francisco, sponsored the project as part of its own 50th anniversary, according to CBS News San Francisco. The South San Francisco Planning Commission approved the work in late May after determining it was reversible and treated it as routine maintenance, since the city already repaints the sign roughly every other year anyway.
None of that is the interesting part. The interesting part is which letters got which color, and why.
The order of the colors is the actual story
A conventional patriotic paint job runs red, white, blue from top to bottom. South San Francisco's runs red, blue, white. That is not a mistake. According to the San Mateo Daily Journal, city spokesperson Angenette Lau explained the sequencing was designed around "the confusion people already have with South San Francisco being its own city." The word "SAN FRANCISCO" got the darker, harder-to-read blue. The words "THE INDUSTRIAL CITY," the part that actually distinguishes this place from the city forty minutes north, got the bright white.
The city said as much directly. In an Instagram comment reported by SFGate/San Francisco Chronicle, officials explained that "some people confuse us with the city of San Francisco," so they left the nickname legible and let the shared part of the name recede into the hillside.
That is a city, in 2026, still actively managing a mistaken-identity problem with paint. It is also, if you have spent any time explaining to a rideshare driver or a delivery service that South San Francisco and San Francisco are not the same zip code, not remotely surprising.
A name that has been correcting people since 1908
South San Francisco incorporated on September 3, 1908, after a dispute with San Mateo County, which had blocked construction of a smelter that local boosters wanted, according to Wikipedia's history of the city. The name itself was a branding decision from the start. Meatpacking executive G.F. Swift, whose Western Meat Company anchored the town's early economy, is credited with the name, drawing on his existing operations in South Chicago and South Omaha, according to the South San Francisco Public Library's local history collection on Calisphere. The two cities have never shared a government or a mayor, but they have shared a name-based headache for over a century.
The 1923 sign was the original fix. It was carved into the hillside and filled with whitewash, a mixture of lime, white cement, and water, and finished by November 22 of that year, according to the Wikipedia entry on the hillside sign. The permanent concrete letters went up in 1929, sized between 48 and 65 feet tall on the south face of a 581-foot hill, engineered so the uneven slope wouldn't distort the type from the highway. The sign earned a spot on the National Register of Historic Places in 1996. For a hundred years, its entire job has been to tell drivers on 101 exactly where they are, because apparently they kept needing to be told.
This summer's color choice is just the newest version of that same job, done in paint instead of whitewash.
Residents are already proving the sign's point
The reaction has been split, and the split itself is the evidence. Some residents told ABC7 the darker colors backfired. South San Francisco resident Carlos Ceron said "you cannot see it from far away," which is a strange complaint to have about a sign built specifically to be visible from the freeway. Other residents said they missed the traditional white and hoped the city would treat the letters the way Los Angeles treats the Hollywood sign, never touching the finish. Social media commenters cited by SFGate went further, saying the blue and red blended into the hillside landscape so completely that only the white letters spelling "THE INDUSTRIAL CITY" read clearly at all, which means the sign is currently doing exactly what the city said it wanted it to do, just louder than expected.
Other residents loved it without reservation, calling it a nice gesture worth the effort. Nobody in the coverage was neutral. A landmark that most people drive past without a second thought produced actual disagreement this summer, which tells you the sign still matters to the people who live under it, even when they can't agree on what color it should be.
Go see it before it goes back to white
The city has called this a one-time installation, not a permanent change, and the historic finish has always been whitewash. That means the window to see the patriotic version in person, rather than in a news photo, is closing without a fixed date attached to it.
If you want to walk up and judge the colors for yourself, Sign Hill Park gives you the access. A few practical numbers before you go:
- Ridge, Seubert, and Letters Loop: 1.4 miles, about 488 feet of elevation gain, starting near Diamond Avenue and circling the letters themselves, per AllTrails
- Iris Hill and Ridge Trail Loop: a shorter 0.7-mile loop, roughly 34 minutes round trip, dog-friendly on leash, also via AllTrails
- Total park footprint: 30 acres of open space and close to 2 miles of combined trail, according to Wikipedia's entry on the sign
- What you'll see from the top: the letters up close, San Bruno Mountain, and on a clear day, the bay and SFIA runways, since the sign was originally sited to be visible from the airport as well as the highway
Both loops are steep enough to earn the view. Neither requires technical gear, just shoes with grip, since the upper sections get loose underfoot after rain.
The paint fades, the pattern doesn't
Whatever the letters look like by the time you read this, the real story isn't the color, it's the choice. A city named to distinguish itself from its more famous neighbor spent a century building the largest possible visual argument for its own identity, and then, given the chance to repaint that argument for a national anniversary, used the opportunity to make the argument again, just in different pigment. That's not civic indecision. That's a hundred and eighteen years of the same conversation, still going, still visible from the freeway.
If you live in South San Francisco, that argument is part of your address whether you think about it or not. It's the reason your packages sometimes get routed to the wrong San Francisco, the reason out-of-town guests ask if you live "in the city," and the reason a hillside sign still needs paint touch-ups in 2026 to keep making a point it first made in 1923.
South San Francisco knows exactly what it is. It just occasionally needs to remind the rest of us in 65-foot-tall letters.
If you're curious about more of what's happening around town, or you want a local's read on a specific block before you make a move, Bryan Cruz and Rey Ancheta keep a running guide to the neighborhood at their South San Francisco community page, built from the same kind of on-the-ground detail as this one. And whenever you're ready to see what a home nearby is actually worth in today's market, their instant home valuation tool is free to use, no repaint required.
