Grateful Dead "Hayfever" at Avalon Ballroom - 1966 (Poster)

Vintage "Hayfever" poster promoting shows with Grateful Dead, Leaves, and Grass Roots at Avalon Ballroom on May 27 & 28 in 1966. Designed by Wes Wilson.

Measures ~ 14x20.5 inches. Some wear and tear, see photos.