This event is a sanctioned race under the Canadian Association of Rally Sport.
Organizers bill it as: "a true WINTER EVENT. Teams must be prepared for exposure to cold and snow. Warm clothing and other basic winter amenities should be stored in the rally cars. Service crews need to be adequately prepared for extended time outdoors in winter conditions."
Spectators should be prepared for the same. A good winter vehicle may be needed to get to some of the staging areas in order to watch the race.
More info
Heading up as a spectator? Check out these local tips to Big White Ski Resort and why you should make time for some turns of your own, while you're there for the weekend.
For more on the race itself, check out the Big White Winter Rally website.