Where do you see this?
Straight from the website....
We are excited to be adding free skiing/riding at Sierra-at-Tahoe for new and existing Gold and Silver passholders. Gold and Silver passholders will now be able to ski/ride Sierra-at-Tahoe Sunday-Friday, non-holiday. That's 8,000 acres, 15 terrain parks, 2 super pipes, 57 lifts, and 316 trails across three Lake Tahoe ski resorts. Blackout dates will include December 26-31, 2012, January 19-20, 2013 and February 16-17, 2013.