 According to Judithe Hernández, the first female member of Los Four, de la Rocha was also a "brilliant printmaker", much whose imagery was drawn from "his [very fragile] mental state".De la Rocha was also influential in establishing the traditional Mexican celebration of the Day of the Dead in Los Angeles, when he, along with Chicano artist Gronk and a few others, led a procession from Evergreen Cemetery up First Street in Eastside Los Angeles.Luján later said that de la Rocha "should be given credit for initiating this process—almost single-handedly.