Captured at San Francisco's Fillmore in 1968, this live set documents Santana at a crucial early moment, when they were channeling late-60s psychedelia through a distinctly Latin-rock sensibility. The extended jams showcase Carlos Santana's emerging guitar voice alongside the hypnotic interplay of congas, timbales, and Gregg Rolie's spiraling organ. Tracks like "Jingo" stretch past nine minutes, with the band finding grooves that are simultaneously psychedelic and rooted in Afro-Cuban rhythms. This is Santana before they became arena-rock staples, raw and exploratory, still learning who they wanted to be.