Frozen room, frozen beds.
Nice enough hotel, if the room were heated before guests arrived. We arrived around 9 PM, with kids, to sleep and hit the slopes early next day. The room was frozen, the heat was off, and I checked with reception - they think this is normal.
The heat pump, once turned on, heats the air quickly enough, but beds stayed frozen for 2-3 hours, and the bathroom was warm by the morning. So unless you have a few hours before bed time, I don't recommend staying in Silverthorne Days Inn in winter time.