Calorie-Count About.com Health
Calories Burned for Activity: Skiing
Cross Country, Hard Snow, Uphill, Maximum, Snow Mountaineering

1122 calories per hour

Assuming a body weight of: 150 lbs
This is equivalent to eating any of the lines of the following table.

Quantity Description Cals
4.3 Grande Starbucks Caffe Latte - Made with whole milk 260
1.6 McDonald's Big Mac - With cheese 704
14.2 Glasses of wine (3.5 fl oz) 79
4.1 Snickers Bar 273
5.4 Cans of Coca-Cola 207
37.4 Carrots 30