The onset of winter makes it more challenging to reach the backcountry. Snowshoes are my favorite means of venturing out in winter, even if I can't get nearly as far as I can on snow-free trails in the summer.
We've received several feet of snow so far, but settling, melting, and evaporation mean that you can get around pretty well with just boots below 9,000 feet. Above that, I think skis or snowshoes are the way to go.
You may recognize the location of these photos, as the bend in the Crystal River below Chair Mountain is one of my favorite places to shoot any time of year. We had a one-day break in the winter storms, and I went out yesterday morning to capture many images.