He befriended Jerry Garcia on New Year's Eve 1963, when Weir was 16 and Garcia was 21. Within two years they had gone electric and named themselves the Grateful Dead. Weir played rhythm guitar for 30 years, standing slightly to Garcia's left while audiences watched Garcia. He rarely played solos. His 1972 solo album Ace produced Dead staples 'Playing in the Band,' 'Cassidy,' and 'One More Saturday Night,' which is how you realize he was doing more than keeping time.
Weir spent his final years headlining Las Vegas's Sphere. Dead & Company's two residencies there totaled 48 shows, still the venue's record. The band existed partly to give Weir a reason to keep touring and partly because no one had a better idea for what to do with the Grateful Dead's catalog after Garcia died in 1995. The choice of John Mayer on lead guitar irritated the faithful. They came anyway.
His guitar technique was lifted from McCoy Tyner's piano work in the John Coltrane Quartet. He admitted this was his 'dirty little secret': that he learned chords by imitating a jazz pianist, not a rock guitarist. The result was a style that rhythmically anchored the Grateful Dead while doing something harmonically that most rock rhythm players weren't even trying. He spent 60 years being underrated by people who should have known better.
A public memorial called 'Homecoming' drew thousands to San Francisco's Civic Center Plaza on January 17, 2026. Joan Baez and John Mayer spoke. Gyuto Tibetan Buddhist monks offered healing prayers at the request of Mickey Hart. His family asked that roses be distributed by the Wharf Rats, a group of sober Deadheads. The Las Vegas Sphere displayed his photograph on its exterior.