During the winter the road to artists point closes just past Heather Meadows. There is a large trailhead parking lot just past there for winter use. It’s a popular backcountry skiing starting point (I was up there last week).

If you don’t have any experience with snow travel it’s probably a good idea to find a group to go with. It is the backcountry and avalanches can happen, so you should know basic avalanche safety and carry a beacon and rescue kit and go with a partner, or find a group that will take you up.