Many people know about the "S" that used to be on the side Cowles Mountain, but how many of those many know about the "G"? On the approximately east side of the mountain students from Grossmont High School would trek up and paint the "G" with white wash. This extremely rare screenshot from a film-transfer video of the construction of Pershing Jr. High School in the early 1960s shows the remarkable letter quite clearly.
Grossmont High History
San Diego State Aztecs--Aztec Sports and Conference Discussions--S mountain tradition