Sierra At Tahoe Mountain, CA Report: The Entire Mountain is Now 100% Open As of today, Sierra at Tahoe Mountain is 100% OPEN thanks to the recent opening of The Backside. Having received over 110โ of snowfall to date, itโs been an incredible start to the season for the beautiful Lake Tahoe ski area. With 46 open trails and 7 lifts scheduled to spin, Sierra At Tahoe has 2,000 acres of playful terrain. […] Industry News SnowBrains | December 13, 2019 0 Comments