Preheat your oven to 250°F (120°C). Line a large baking sheet with parchment paper.
In a large mixing bowl, combine the Chex cereal, pretzel sticks, mixed nuts, bagel chips, and dill pickle-flavored popcorn.
In a separate bowl, whisk together the melted butter, dill pickle juice, garlic powder, onion powder, dill weed, cayenne pepper (if using), and salt until well combined.
Pour the butter mixture over the cereal mixture and gently stir until everything is evenly coated.
Spread the mixture evenly onto the prepared baking sheet.
Bake in the preheated oven for 1 hour, stirring every 15 minutes to ensure even toasting.
Remove from the oven and let it cool completely before serving.