Euphrates River is the sixth album by American singing group The Main Ingredient.

In addition to the standard 2 channel stereo version, the album was also released in a 4 channel quadraphonic version in 1976.

The quad LP was encoded using the Compatible Discrete 4 system.

This album was reissued in the UK on the Super Audio CD format in 2016 by Dutton Vocalion.

The release contains both the stereo and quad mixes.