The Big "C", Hillside letter on Tightwad Hill in Berkeley, United States.

The Big C is a large concrete letter positioned on Tightwad Hill that dominates the hillside with its white surface. The structure sits on a steep slope and can be seen from numerous locations throughout Berkeley and the surrounding areas.

The Big "C" was built on March 23, 1905, by the freshman and sophomore classes after the university banned the dangerous class rush tradition. A plaque reads "In memory of the Rush, buried Charter Day 1905 by the classes of 1907 and 1908." The freshmen painted it gold, and the sophomore class later became responsible for keeping it painted.

The letter serves as a visual symbol of UC Berkeley's identity and presence overlooking the city. People from the university community and residents alike recognize it as a landmark that represents their connection to this place.

The letter sits on Charter Hill above the Greek Theatre and California Memorial Stadium. The Rally Committee, its guardian since the 1960s, maintains and protects it. The site is on a steep slope, so wear sturdy shoes; no formal trailhead or facilities are documented.

In 1961, Stanford engineering students used jackhammers to reshape the concrete into a block "S"; the damage was quickly repaired. The Rally Committee now guards the letter and keeps it painted.