This essay examines how maps created by Latina/o youth created “ephemeral forums,” improvised ad hoc spaces that served as music venues in 1990s South Los Angeles. The maps included on “Rock en Español ” event flyers demonstrate how Latinx youth envisioned Los Angeles and proclaimed their sense of place in the metropolis at a moment of social and demographic transformation. These maps help us understand how they and other Californians of color create and claim belonging,both past and present.