Trey Anastasio of Phish, Billy Strings and Sturgill Simpson were among the special guests to join the band over three nights of concert and amid a city-wide celebration.

Ever. Why? Because at this point, 60 years after the Grateful Dead made their mark on this psychedelic town, it's no longer about the band personnel as much as it is all about The Vibe.

Tens of thousands of Deadheads packed San Francisco's Golden Gate Park on Saturday for the second day of a three-day concert series honoring the Grateful Dead's 60th anniversary.