Cross country skiing is one of my favorites, and its a good cold weather activity as the body produces alot of heat. I was out yesterday for two hours with a temperature of -29 C -20F skiing up the series of beaver ponds behind the house. When its warmer I like going to the remote cabin and spend time in the bush. I heat the house with wood and that keeps me busy when temps drop. Last night it reached -40, fire runs steady and the oil furnace has not run for the past week.