Family travel with 9 month and 4 year old

We are planning on a trip and have a few to choose from, Big Sky, MT being one of them. Obviously the 9 month old will not care where we go, but we have a 4 year old daughter. Do you think MT could be the trip for us, or do you think she is too young to do anything there? We are looking for a fun family friendly trip. We would be going in August. Thanks for any and all advice, it is much appreciated!!

Family travel with 9 month and 4 year old

We had a 4yo in our group when we were there. The resort is quite nice, and she had a lot of fun riding the lift up to the top of the mountain and going on a short horseback ride at a local dude ranch. She also liked the time we spend down at Old Faithful and it wasn%26#39;t too much of a ride.

We had girl cousins for her to follow around, and other cousins to read to her and watch her endlessly showing new fancy dives into the pool, so that was cheating on our part!

I really liked it there.

A similar mountain/outdoors place with a little more in the way of developed activity would be the resort in Sun River,Oregon. You can day trip to Crater Lake, go to the Museum of the High Desert, Lava Tube, Lava Cast Forest, lots of bike journeys (most of the rental houses come with bikes).