My Only Red Rocks winter Options (thus far) are below. Three from Eldorado Canyon State Park and one of the Flatirons from Table Mesa. I say thus far, because we are having our first significant snow fall tonight. If I see a good opportunity I'll go out Thursday morning with the Mamiya 6 and see what I find.
Eldorado Canyon #1
Eldorado Canyon #2
Eldorado Canyon #3
Flatirons 1: From Table Mesa
I'm leaning towards the last two, but thought I would give you all of the options. All taken with the Mamiya 6X6 while it was snowing.