Junky and Valygrl - ya'll need to try cross country skiing during the winter. I started skate skiing 6-7 years ago and its been a real blessing for my winter fitness. Tones the arms/core/arse and thighs. Even with the minimal snow we've seen on the front range this year Eldora has had pretty good conditions since the second week of december. Lets you get outside, breathe some unconditioned air. Keeps me from bloating up and flipping out in the winter months.