12 oz Corona (you can up it to 2 bottles if you like)
12 oz white tequila - I used Jose Quervo Silver
12 oz Cherry 7 up
a can of Limeaide frozen concentrate thawed (or frozen)
It did not make a ton, but the amount it made was very strong. So we poured 1/2 a beer in a cup and then added the Beergarita to the cup.
p/s ... Lake and beach not included :)