South San Francisco Hillside Sign

The white concrete letters of the South San Francisco Hillside Sign extend across three lines, measuring 166, 484, and 628 feet in length respectively.

The Chamber of Commerce initiated the sign project in 1923, replacing the original whitewashed letters with larger concrete ones in 1929 to promote industrial development.

The sign remains a representation of South San Francisco's transformation from an industrial center to a modern technological and biotechnology hub.

Sign Hill Park provides nearly 2 miles of hiking trails that allow visitors to walk directly to the massive letters visible from Highway 101.

The letters, ranging from 48 to 65 feet in height, use anamorphic design to appear uniform in size when viewed from distant locations.

Location: South San Francisco

GPS coordinates: 37.66142,-122.41896

Latest update: May 13, 2025 12:23