Preheat your oven to 350°F (175°C).
In a large mixing bowl, combine the Corn Chex, Rice Chex, Wheat Chex, and pretzels. Stir gently to mix them evenly.
In a small saucepan over low heat, melt the butter or margarine. Stir in the white vinegar and salt.
Pour the butter mixture over the cereal and pretzel blend. Toss everything together with a spatula.
Spread the mixture onto a large baking sheet in an even layer.
Bake in the preheated oven for 15-20 minutes, stirring every 5 minutes until golden brown.
Once out of the oven, fold in the Blue Diamond Salt 'n Vinegar Almonds.
Allow the snack mix to cool completely before serving.