Echo Zulu is out of Letgomyecho (Menifee), a graded winner who was unbeaten in three sprint starts, among them the Grade 2 Forward Gal S. in 2005. Besides Echo Zulu, Letgomyecho has produced nine winners and has bred four graded performers plus a further multiple stakes-placed runner, headed by Echo Town (Speightstown), winner of the Grade 1 Runhappy H. Allen Jerkens S. in 2020, and J Boys Echo (Mineshaft), who took the Grade 3 Gotham S. in 2017. Another of her offspring is the stakes-placed Dragic (Broken Vow). Three of the six graded winners out of Menifee mares are her offspring.

Second dam Echo Echo Echo (Eastern Echo) was stakes-placed and produced three other stakes horses, among them the stakes winner Soundwave (Friends Lake), dam of the Grade 3 winner Dean Martini. She is also the second dam of Western Smoke, a Grade 3 winner in the US, and of Ocean Vision, a Listed winner in France.

Third dam Kashie West (Sir Ivor) was a winner and bred seven other winners.

The fourth dam is the ancestress of the Grade 1 winners Engine One, Next Question, Voodoo Dancer and the sire Singletary.

Her most recent reported foal is the unraced 3-year-old filly Doing Justice (American Pharoah).