Well, given I'm in Alaska and haven't lived through an entire winter yet, I don't know. I doubt I'll join the hard-core winter riders (there are a bunch of those) my first cold season, but do hope that until the road ices over I can ride a road bike and during times when the temperature stays around the 0°F/-20°C mark I can at least amble over some snowy trails once in a while.
But mostly I plan on taking up regular cross-country skiing. My workplace's back door goes out on a trail system: I just have to cross a parking lot. The other items on the winter fitness plan are to start weight lifting seriously (I have "The new rules of lifting for women" and am intrigued) and then there's running ... I still have a hard time believing that the human body is capable of running continuously for an entire mile or even more. Time to try it out!
Chris - formerly of Heidelberg, Paris and London, now of Fairbanks, Alaska
2011 Kona Sutra 49cm - Selle Italia Diva
2009 Specialized Rockhopper Comp Disk 15" - Specialized XC Body Geometry, 143mm