Hi- Thanks for your question!
The following are ideas for everyday wear rather than for outdoor sports, although I guess they would keep you warm there too:
The thickness of corduroy fabric makes it extremely durable and perfect for the harsh winter weather.
Some of the warmest pants for winter wear are blue jeans lined with flannel. You can find them at many different stores, such as LL Bean(http://www.llbean.com/) and Cabela’s (http://www.cabelas.com/home.jsp). Many brands are also available at http://clothing-and-accessories.become.com/flannel-lined-pants
Carhartt Bib Overalls are warm and are especially good for working outdoors: http://www.hanksclothing.com/carhartt_bib_overalls.html
Wool will definitely keep you warm, maybe even too warm, lol: http://www.filson.com/products/mackinaw-field-pants.14010.html http://johnsonwoolenmills.com/
Cashmere is a more stylish type of wool: http://www.become.com/cashmere-pants
If you want to be warm and make a fashion statement as well, you could also try a pair of stylish leather pants.
This should give you a lot to choose from! Please give me a rating using the star system so I can get credit for my answer. After that, if you need more information, just let me know and I'll be happy to help.
All the best to you, Patience P.