This awesome gem is near Idaho Falls and offers some great winter fun. This would be  a great romantic trip or trip with the family.

This is the Mountain River Ranch about 18 miles outside of Idaho Falls. They have theater shows nightly in December, great dinner theater with holiday sleigh rides and hot cider... sounds fun! This ranch was featured on 'Love Where You Live TV'. This is a drive for those in the Treasure Valley but may be worth it if the weather permits. You can call for reservations or find them online here.

This is what their website says about the winter theater nights :

Thousands of colorful lights decorate Mountain River Ranch with holiday cheer. The doors open at 6:15pm. Once you're checked in, enjoy a cup of hot cider while you wait for the horse-drawn sleighs. You'll love singing all your favorite holiday songs as you travel across the snow-covered fields, through the frosty air to either of our two facilities.