Add the milk, juice, cherries, pineapple, avocado, maple syrup, and yogurt to a blender. Mix on high speed until very smooth.
½ cup plant milk, ½ cup tart cherry juice, 1 cup frozen cherries, ½ cup frozen pineapple, ½ frozen avocado, 2 teaspoons maple syrup, 2 tablespoons coconut yogurt