The Ultra Zone is the sixth studio album by the American guitarist Steve Vai, released on September 7, 1999, through Epic Records.
The Ultra Zone is structurally similar to Vai's previous album, Fire Garden, in that the first half of the album consists mainly of instrumentals, and the second half mainly of vocal songs; however, unlike Fire Garden, The Ultra Zone is not formally divided into two "phases".
The Ultra Zone is notable for its tributes to two guitarists: Frank Zappa (on the track "Frank"), and Stevie Ray Vaughan (on the track "Jibboom").
This was Vai's last studio album of original material until 2005's '; in the years in between, he released several compilations and live albums.
Koshi Inaba and Tak Matsumoto of the Japanese rock duo B'z are featured on "Asian Sky".