The primary, most deeply embedded athletic and institutional rival for the California Golden Bears is Stanford University, located just across the San Francisco Bay. This historic cross-bay rivalry, known commonly as the Big Game in football and encompassing all other varsity sports, represents one of the longest-running and most fiercely contested series in collegiate sports history. The annual matchups carry immense regional pride, school spirit, and tradition, culminating in the battle for the coveted Stanford Axe trophy.