If you enjoy a salted glass, prep the rim of your highball glass by rubbing a lime wedge along the rim. Dip in tequila salt, and set aside.
Make the cocktail:
To the highball glass filled with ice, add Mezcal and grapefruit juice. Mix well with a cocktail spoon before topping off with sparkling water or citrus soda to make this drink taller.
Garnish:
Garnish with grapefruit, lime, or lemon wedges. Enjoy!