Suite: Judy Blue Eyes

The title plays on "Sweet Judy Blue Eyes" and refers to Judy Collins. The song has four sections and follows the form of a classical suite. Stills played an acoustic guitar in a modal tuning, EEEEBE, which he later used on "4 + 20" and "Carry On". The final section is sung in Spanish, and Stills said he made it difficult on purpose so nobody would understand it. A conga-like sound at the end comes from Stills beating the back of his Martin guitar. The single version reached No. 21 on the Billboard Hot 100.

Bill Halverson, who engineered the album, told Sound On Sound that the trio's first day at Wally Heider's Studio 3 in February 1969 began with Stills playing the basic track in one take of about seven and a half minutes, with no edits. Halverson thought Stills' old Martin D28 sounded dull, so he added top end on a Neumann U67 and feared the result was poor, but Stills told him it was the sound he had been looking for. Crosby, Stills and Nash then sang around a single U67 set to omni mode, Stills also recorded a bass part, and they cut "You Don't Have to Cry" the same evening.

CSN opened with the song at Woodstock and at Live Aid, and the Woodstock performance appears in the 1970 film. Its last section opens the live album 4 Way Street. Rolling Stone ranked it No. 418 on its 2004 list of 500 greatest songs, and it is in the Rock and Roll Hall of Fame's list of 500 Songs That Shaped Rock & Roll. Robert Christgau, writing in The New York Times in 1969, called it a structural triumph.