How Deep, How High, is an album by saxophonist Warne Marsh and pianist Sal Mosca, recorded in concert in 1976 and studio in 1979 and released on the Interplay label.

[1][2][3] The Rolling Stone Jazz Record Guide commented: "How Deep, How High reunites Marsh with another Tristano student, pianist Sal Mosca, for a re-examination of academic roots.

The dedication to a fluid, melodic concept remains intact, but gone is the strict adherence to a lightly colored tone".

[4] The AllMusic review states: "The music ranges from introspective to more driving, but it swings throughout, and Marsh's solos are always intriguing".

[5] All compositions by Warne Marsh except where noted