Bob Weir, founding guitarist and vocalist of the Grateful Dead, has died at 78. According to a statement shared on his official website and social media, he passed away peacefully surrounded by loved ones. Weir had been diagnosed with cancer in July and recently completed treatment. Though he beat the disease, he ultimately succumbed to underlying lung issues. His death closes a remarkable six-decade career that reshaped live music and built one of the most devoted fan communities in rock history.

Just weeks after beginning treatment, Weir returned to the stage at Golden Gate Park to celebrate the Grateful Dead’s 60th anniversary — a fitting testament to his lifelong dedication to performing. Weir joined the band as a teenager in the early 1960s after meeting Jerry Garcia in a Palo Alto music store. Originally called The Warlocks, the group evolved into the Grateful Dead, becoming central to the Haight-Ashbury scene and a generation seeking freedom through music.

Known for marathon jams and ever-changing set lists, the Dead created an experience rather than radio hits. Weir’s distinctive rhythm guitar style became the foundation of that sound. He co-wrote classics including “Sugar Magnolia,” “Truckin’,” “Cassidy,” and “Throwing Stones.” After Garcia’s death in 1995, Weir carried the music forward through projects like The Other Ones and Dead & Company, introducing new generations to the band’s legacy.

Beyond music, he was known for activism and his belief in music as connection and community. He is survived by his wife, Natascha Münter, and daughters Monet and Chloe. For millions, Bob Weir wasn’t just a musician — he was part of the journey.