This past year, we had a pretty harsh winter here in Wisconsin and it made things pretty trying for me training for a marathon. We had over 100 inches of snow here which smashed the previous 1978 record by close to 30 inches. As you would expect in Wisconsin we had some pretty cold temps as well, but being the hardcore runner that I am (hardcore meaning stupid), I usually headed out for 10 to 15 mile training runs in -19 below temps several times. We have a lot of nice bike paths here in Madison and when I'm out running around Lake Monona, you generally always see other runners or bikers out. There were a couple occasions, when the temp was well below zero, that I was the only runner out there to be seen.... again, am I dedicated or stupid ?:| ... who knows. The point is that if you dress properly I think anyone is more than capable of running outside in cold weather. Actually, I find that after my body gets adjusted and warmed up the first mile or so, I am pretty comfortable. Like I always tell people, it's easier to stay warm for cold weather running than it is to stay cool when it's incredibly hot out. At least when it's cold out, you can dress appropriately and bundle up. When it's hot, aside from running in your birthday suit, there isn't a heck of a lot you can do to stay cool. The only problem I encountered when running below freezing temps was keeping some exposed areas on my face protected... that was until my brother told me I should slather some vasoline on my face to protect it. It may feel a little greasy and gross but it actually really does the trick. It protects the face from the harsh cold and wind while at the same time giving your face a thin layer of insulation that also moisturizes and protects your skin from drying out and getting wind burn. If you ever need additional face protection, give it a try. The main thing for running in the cold is each persons individual tolerance. Some people just hate the extreme cold while other seem to be related Frosty the Snowman or Jack Frost and have no problem at all with it. I know a lot of people ask me all the time how I can breath in that frigid, crisp air and not be affected. I guess I have just gotten used to it over the years. The main thing for me is having a clear running path... free from snow and ice. If I have that, I am as happy as a lark. I'll deal with any cold temps as long my route is clear... for me, it's better than the alternative... going to the lousy health club to run on the stinkin' treadmill and breathing in stale air.