Snowbird is just about a half hour outside SLC--there is a spa, a pool, restaurants and beautiful scenery
I went to a convention there in 2008 and loved it.
ETA: If you want an interesting dining experience in SLC, try the Red Iquana. It's a Mexican restaurant (I know-SLC?) and they have 20 different kinds of moles (that's mo-lays, not little mammals ) and really good margaritas.
[This message edited by Sad in AZ at 5:15 PM, August 10th (Saturday)]