Bob Weir, guitarist and jam-band pioneer who co-founded The Grateful Dead and continued their legacy in the 21st century with Furthur, Dead & Company and more, died due to underlying lung issues after fighting cancer. Weir’s death was confirmed Saturday (Jan. 10) by a statement published on his official social media accounts. He was 78.

“It is with profound sadness that we share the passing of Bobby Weir. He transitioned peacefully, surrounded by loved ones, after courageously beating cancer as only Bobby could. Unfortunately, he succumbed to underlying lung issues,” said the statement, which can be found on Weir’s Instagram.

The note continued: “For over sixty years, Bobby took to the road. A guitarist, vocalist, storyteller, and founding member of the Grateful Dead. Bobby will forever be a guiding force whose unique artistry reshaped American music. His work did more than fill rooms with music; it was warm sunlight that filled the soul, building a community, a language, and a feeling of family that generations of fans carry with them. Every chord he played, every word he sang was an integral part of the stories he wove. There was an invitation: to feel, to question, to wander, and to belong. 

Bobby’s final months reflected the same spirit that defined his life. Diagnosed in July, he began treatment only weeks before returning to his hometown stage for a three-night celebration of 60 years of music at Golden Gate Park. Those performances, emotional, soulful, and full of light, were not farewells, but gifts. Another act of resilience. An artist choosing, even then, to keep going by his own design. As we remember Bobby, it’s hard not to feel the echo of the way he lived. A man driftin’ and dreamin’, never worrying if the road would lead him home. A child of countless trees. A child of boundless seas. 

There is no final curtain here, not really. Only the sense of someone setting off again. He often spoke of a three-hundred-year legacy, determined to ensure the songbook would endure long after him. May that dream live on through future generations of Dead Heads. And so we send him off the way he sent so many of us on our way: with a farewell that isn’t an ending, but a blessing. A reward for a life worth livin’.

His loving family, Natascha, Monet, and Chloe, request privacy during this difficult time and offer their gratitude for the outpouring of love, support, and remembrance. May we honor him not only in sorrow, but in how bravely we continue with open hearts, steady steps, and the music leading us home. Hang it up and see what tomorrow brings.”

In a career spanning six decades, Weir was key to developing the Grateful Dead from garden-variety psychedelic rockers as the Warlocks to godfathers of the jam band genre. Weir’s loping, syncopated guitar style, modeled after “McCoy Tyner’s left hand,” may not have made much sense in a traditional rock band, but to the Dead, it was a crucial puzzle piece.

His decades-long bandmate, bassist Phil Lesh — who died in 2024, at age 84 — called him “a stealth machine” in a 2012 feature in The New Yorker. “[Bob is] still absolutely enigmatic to me,” producer Don Was told GQ in 2019. “He’s part Segovia and part John Lee Hooker, and he does both simultaneously — this exotic blend of the raw and the cerebral.”

Raised by adoptive parents in San Francisco, California, Weir met his future Dead bandmates in 1964. In high school, he began music lessons at the feet of Jerry Garcia, who then taught guitar and banjo at Dana Morgan Music in Palo Alto after being dishonorably discharged from the U.S. Army. Weir became Garcia’s occasional substitute teacher, and eventually, he was recruited for Garcia’s band, the Mother McCree’s Uptown Jug Champions — featuring bassist Lesh, keyboardist Ron “Pigpen” McKernan and drummer Bill Kreutzmann. 

Inspired by The Beatles’ rise, the band pivoted to rock and roll, briefly playing out as the Warlocks before discovering that another band had taken the name. At a band meeting, Garcia flipped through a dictionary under the influence of DMT and blurted the first two words that he saw: “grateful dead.”

The newly christened Grateful Dead released their self-titled debut in 1967, featuring R&B standards and originals with a lysergic tint, but they soon revealed themselves as a much different beast. Eager to capture their swirling live energy, they released Live/Dead in 1969, in which they stretched songs like “St. Stephen” and “Dark Star” like taffy until they were sidelong juggernauts. 

On that album, one can hear Weir’s playing developing from blues licks to odd, percolating lines that had little to do with traditional rock guitar — and could push Garcia and Lesh to new improvisational heights. “I derived a lot of what I do on guitar from listening to piano players,” he told GQ. “[McCoy Tyner] would constantly nudge and coax amazing stuff out of Coltrane.”

The Dead went on to release an ocean of official live albums, which only scratched the surface: a massive “taper” subculture formed around their fan-traded bootlegs. As they veered into space-rock territory, Weir kept the sets grounded with cowboy songs, like Merle Haggard’s “Mama Tried,” and Dylan covers, like “When I Paint My Masterpiece.” He released his solo debut, 1972’s Ace, with the rest of the Dead as his backing band. 

After rough goings in the disco era with 1978’s Shakedown Street, the Dead flirted with pop success by way of 1987’s “Touch of Grey,” a friendly ode to survival from their eventually double-Platinum-certified In the Dark LP that peaked at No. 9 on the Billboard Hot 100. During this period, when a struggling Garcia would sometimes check out onstage, Weir stepped up as the Dead’s preening showman, appearing onstage in lavender tank-tops and cutoff shorts.

The Grateful Dead got by and survived through health scares and drug issues, and remained together and vital until Garcia’s death in 1995, performing over 2,300 concerts and selling over 35 million albums. After they disbanded, Weir stayed busy with band offshoots like The Other Ones (later known as The Dead), Furthur, RatDog and more. 

In the later years of his life, he performed Dead material on the road with Phil Lesh, Mickey Hart, Bill Kreutzmann, new collaborator John Mayer and more as Dead & Company, and gained a zealous social media following for documenting his health and workout regimen. 

In 2017, he was appointed a United Nations Goodwill Ambassador for his efforts to fight climate change while serving on the board of the company Tribal Planet. “I’d also like to see people reflexively consider the good of the planet in the choices they regularly make,” he told Billboard in 2017. 

Dead & Company toured through 2023, then had successful residencies at The Sphere in Las Vegas in 2024 and 2025. In 2025, they also performed at the MusiCares Persons of the Year gala; the original lineup of the Grateful Dead was being honored at the event.

Weir brought Dead & Company to San Francisco’s Golden Gate Park in August 2025 for a three-show run celebrating 60 years since the Grateful Dead’s 1965 debut. As the statement announcing Weir’s death revealed on Jan. 10, 2026, he’d been diagnosed with cancer and had begun treatment just a few weeks prior to the Golden Gate Park shows.

Up to the end, he never stopped exploring the possibilities of his instrument, or the liquid possibilities a song can take. “Jerry came to me in a dream not long ago and introduced a song to me,” he once told GQ. “It was kind of protoplasmic — you could see right through it. And he just confirmed to me what I always suspected: that a song is a living organism.”