The mural tradition on Balmy Alley began in 1973, when local artists started painting walls as acts of political expression and community building. The movement intensified in the 1980s during the Central American solidarity campaigns, when artists used the alley's surfaces to protest U.S. involvement in El Salvador, Guatemala, and Nicaragua. The Mission District's large Latino population gave these issues personal urgency -- many residents had family members living through the conflicts depicted on the walls. The murals were not decoration. They were testimony.

Unlike permanent public art installations, Balmy Alley's murals are regularly repainted, replaced, and updated. A mural protesting the wars of the 1980s might be painted over with one addressing gentrification in the 2010s. The alley responds to the present tense. Some works are commissioned through community organizations; others appear spontaneously. The quality ranges from professional to folk, and that range is part of the alley's character. A mural by a celebrated muralist might sit next to one painted by neighborhood teenagers. Both belong there.

Balmy Alley lies within the Calle 24 cultural corridor, a stretch of 24th Street that community advocates have fought to preserve as a Latino cultural district amid intense gentrification pressure. Rising rents and tech-industry wealth have transformed the Mission District's demographics over the past two decades, displacing many of the families whose stories the murals tell. The alley's paintings now address this displacement directly. To walk through Balmy Alley is to see a community narrating its own survival in real time, using the only medium that the landlords cannot evict.