Preheat oven to 275 F. Line a half sheet pan with silicone baking mat. If you don't have a half sheet pan, line two smaller pans.
Combine Chex cereals, Cheerios, pretzels, crackers, and nuts in a large bowl.
In a microwave safe bowl, melt butter.
Stir honey, vanilla, and salt into melted butter.
Pour honey butter mixture over snack mix, and toss to evenly coat.
Transfer snack mix to prepared baking sheet(s).
Spread snack mix out in an even layer.
Bake for 15 minutes. Stir.
Bake for another 15 minutes. Stir.
Bake for another 10 minutes. Stir.
Mix sugar and cinnamon together.
Sprinkle over snack mix, tossing to coat.
Bake for 10 more minutes.
Remove from oven and allow to cool before serving.
Store in an airtight container.
