How long does dinner and a snow and a show take

That depends if it's a full on blizzard or just a light snow fall.

If you have a optional dining reservation with us, you'll be with from 6:30 - 10 or 10:30. If you choose to skip the dining reservation, from 8 to 10 or 10:30.

Guessing about 3hrs in general. They also have desert and beverage with the show. That is probably about 2 to 2 1/2 hours.