On these days, says Wikipedia,

The KFRC Fantasy Fair and Magic Mountain Music Festival was [held] at the 4,000-seat Sidney B. Cushing Memorial Amphitheatre high on the south face of Mount Tamalpais in Marin County, California. At least 36,000 people attended the two-day concert and fair that was the first of a series of San Francisco area cultural events known as the Summer of Love. The Fantasy Fair was influenced by the popular Renaissance Pleasure Faire and…is considered to have been America’s – if not the world’s – first rock festival.

Among those who performed:

  • The Jefferson Airplane
  • Canned Heat
  • The Byrds with Hugh Masekela
  • Captain Beefheart & the Magic Band
  • The Seeds
  • The Grass Roots
  • The Doors
  • The Charlatans
  • Tim Buckley
  • Steve Miller Blues Band
  • Country Joe and the Fish
  • The 5th Dimension
  • Dionne Warwick
  • The Mystery Trend

[Note that some of the acts listed on the poster did not actually appear, due the festival’s having been delayed from the previous weekend due to bad weather.]

And how is this Beatles–related, you may ask? Well, only tangentially, I admit. For that reason and due to lack of time, I will let it go it that, but it seemed like it needed to be mentioned.