Trey Anastasio, Sturgill Simpson and Billy Strings joined the Grateful Dead offshoot for three San Francisco shows celebrating 60 years of Grateful Dead music.

San Francisco welcomed Grateful Dead offshoot Dead & Co. back Friday night for a hell of a birthday party. The first night of a three-night Grateful Dead 60th anniversary residency took over the Polo Fields of Golden Gate Park,

Fans of the Grateful Dead are pouring into San Francisco for three days of concerts and festivities marking the 60th anniversary of the scruffy jam band that came to embody a city where people wore flowers in their hair and made love,