LOS ANGELES, CA. (THECOUNT.COM) — Bob Weir, the legendary guitarist, singer, and founding member of the Grateful Dead, has died at the age of 78, according to statements shared by his family and confirmed by multiple national media outlets.

Weir’s death was announced Saturday via a statement posted to his official Instagram account, which said he passed away peacefully surrounded by loved ones. The statement noted that Weir had previously battled cancer and later succumbed to underlying lung-related health complications.

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Born Robert Hall Weir on October 16, 1947, in San Francisco, California, Weir became one of the most influential figures in American rock music and counterculture history. He co-founded the Grateful Dead in 1965, originally known as The Warlocks, alongside Jerry Garcia, Phil Lesh, Bill Kreutzmann, and Ron “Pigpen” McKernan.

At just 17 years old, Weir joined the band that would go on to redefine live music, improvisational performance, and touring culture in the United States. Over the next three decades, the Grateful Dead became synonymous with extended live jams, genre-blending experimentation, and a fiercely loyal fanbase known as “Deadheads.”

Weir served as rhythm guitarist and one of the group’s primary vocalists, contributing to some of the band’s most enduring songs. Among the many tracks he wrote or co-wrote were “Sugar Magnolia,” “One More Saturday Night,” “Mexicali Blues,” and “Playing in the Band,” all of which became staples of the band’s live performances.

The Grateful Dead’s influence extended far beyond album sales, with their relentless touring schedule helping to shape the modern live music industry. The band’s concerts often attracted tens of thousands of fans and emphasized a unique communal experience that blended music, art, and countercultural ideals.

Following the death of Jerry Garcia in 1995, Weir continued to perform and preserve the Grateful Dead’s musical legacy through numerous projects. He played with bands including RatDog, Furthur, and most notably Dead & Company, which featured John Mayer and toured extensively across the United States.

Dead & Company remained active into the 2020s, drawing large crowds in major cities including Los Angeles, California; New York, New York; Chicago, Illinois; and San Francisco, California. In July, the band performed a series of concerts commemorating the Grateful Dead’s 60th anniversary at Golden Gate Park in San Francisco.

Weir’s passing leaves drummer Bill Kreutzmann as the only surviving original member of the Grateful Dead. Founding bassist Phil Lesh died in 2024, while Ron “Pigpen” McKernan passed away in 1973.

Beyond his musical achievements, Weir was widely recognized for his commitment to artistic independence, environmental advocacy, and musical exploration. Over a career spanning nearly six decades, he remained a constant presence on the road, performing hundreds of concerts well into his seventies.

Tributes from musicians, fans, and cultural figures poured in following news of his death, reflecting Weir’s lasting impact on American music and popular culture. His work helped bridge folk, blues, country, jazz, and rock, leaving a legacy that continues to influence generations of artists.

Bob Weir is remembered not only as a founding member of one of the most iconic bands in music history, but also as a pioneering performer whose dedication to live music reshaped the concert experience across the United States and beyond.

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