Thank you very much and to answer your question. Yes, it was really that way. No color was added to the scene. I used a Singh-Ray neutral density grad filter to balance the exposure, but no color filter or anything in post. Of course, there is some color work in Photoshop involved with every RAW file but never anything added to it that wasn't there in the first place.
I found, the snow usually picks up the most color if it is extremely cold. My theory is that the larger crystals, the better they reflect the light, resulting in a glowing snow. When I took the image, it was zero degrees Fahrenheit outside when I parked the car a mile or so away, eventually even cooler down at the creek.
It's a beautiful shot, with a very subtle glow. The filtering you used was perfect. I know there is color there already, but there are several ways to bring it out -- raising the blacks level, boosting saturation and or vibrance, etc. So I'm still wondering if you used some of those to boost the color a bit in the raw edit.
I rarely mess the the black levels in the RAW conversion, usually only adjusting one or two points there... No saturation, but a little more vibrance, I'd say between 10 and 18 points depending on the shot. I also increase the contrast level in the process since RAW files are super flat.
The thing I like and which brings out contrast are luminosity masks, especially in the midrange. Controlling local contrast is one of the keystones to the images I create. Hope that sheds some light on the process.