Uhh....the temps you call "winter", I call "ooh, a thaw, let's get out the bikes"....sigh...temperature is all so relative....

But, I digress, Evil Coach Troy--Uphill Grind is short and fun (yes, fun). The intervals change frequently to keep you from forgetting the pain. Hillacious is longer, but good. It has some long intervals at the beginning, but I think they helped. Tucson Training rides. Besides getting to see lots of cacti to thaw out your bones, both of the rides on it have you grinding the hills.