Gather all ingredients.
Cut limes into quarters; remove and discard the center part of the rinds. Blend until completely smooth, about 1 minute.
Transfer lime quarters to a blender with cold water, tequila, sugar, orange-flavored liqueur, and salt.
Blend until completely smooth, about 1 minute.
Strain mixture into a large measuring cup or small pitcher.
Serve over ice and garnish with lime slices.
