I would definitely check out Strawberry Park Hot Springs. It’s a wonderful place.
In my experience there, the staff is very good, the facities are excellent, the crowd generally cool and the ambience can’t be matched. There is a “clothing optional” rule after dark. During the day they have staff massage therapists that offer a wide array of therapies – Shiatsu, Watsu, Raindrop, etc.
You can send the wife up there for a massage during the races, or take her up there after dinner.
http://www.strawberryhotsprings.com/
It’s one of the best springs in the state and the best around Steamboat.
Nice drive up there, too. About 7 miles from downtown. Take about 20 minutes or so to get up there.