Add the Rice Chex, Corn Chex, Golden Grahams, almonds and coconut to a large bowl and toss together.
Place the sugar, light-corn syrup and butter into a small saucepan. Set temperature to medium-high and bring the mixture to a boil. Stir occasionally.
Boil for 2 more minutes and continue to stir occasionally.
Remove the mixture from the heat and mix in the vanilla.
Pour over the cereal mixture. Toss until all pieces are evenly coated.
Treat can be stored in an airtight container at room temperature.