One of the more common questions that I receive at this time of year is "Do I need winter tires to drive to ________." The Province of B.C. has provided maps of locations where winter tires (or carrying tire chains for commercial vehicles) is mandatory. Now you can go to the site, choose the appropriate map and answer that question.
To head off the next question, yes, currently all season tires marked with M+S on the sidewall qualify as winter tires. Are they adequate? Well, that's for you to decide. You might be surprised at what M+S actually means and choose to use true winter tires instead.