I have lived in Vail, CO for the past 7 years, and run the Goodyear Duratracs year round. They perform amazingly well in the snow as well as in the sand, rocks, etc. I air down to 18 PSI for the sand dune runs, and 22 PSI when wheeling in Moab. The tread life on them are amazing, with over 50,000 miles on my 2005 LR3, (just replaced them) and now I have them on my 2013 LR4. The only problem I have encountered, is the sidewall is not as durable, but that could due my driving style........I can be a little too aggressive at times. I bought mine at Discount Tire, and pay extra for the tire certificate, so if/when a sidewall puncture occurs, I get a free replacement tire. I think I paid $280 a tire, plus the $34 tire certificate.
Hope that helps.