Combine Crispix, pretzels, peanuts and almonds in a large bowl and set aside.
Cook brown sugar, butter, and corn syrup in a small saucepan over low heat, stirring until butter is melted and sugar is dissolved.
Pour butter mixture over cereal mixture, stirring to coat well. Spread evenly onto a lightly greased aluminum foil lined jelly roll pan (15x10 inches).
Bake at 325ºF for 20 to 25 minutes, stirring twice. Spread immediately onto parchment paper or wax paper. Let stand to cool completely, separating mixture into individual pieces as it cools. Transfer to a large bowl and stir in Bugles. Store in an airtight container.