Sierra-at-Tahoe is a ski and snowboard resort in Twin Bridges, California south of Lake Tahoe. Sierra-at-Tahoe is approximately 16 miles south of Stateline, Nevada and 12 miles south of South Lake Tahoe on U.S. Route 50 and is contained within the Eldorado National Forest. Sierra-at-Tahoe is a medium-sized ski area in the Lake Tahoe region, and is well know…Sierra-at-Tahoe is a ski and snowboard resort in Twin Bridges, California south of Lake Tahoe. Sierra-at-Tahoe is approximately 16 miles south of Stateline, Nevada and 12 miles south of South Lake Tahoe on U.S. Route 50 and is contained within the Eldorado National Forest. Sierra-at-Tahoe is a medium-sized ski area in the Lake Tahoe region, and is well known for being a more family oriented resort and also having a high annual snowfall. Sierra-at-Tahoe's terrain is 25 percent beginner, 50 percent Intermediate, and 25 percent advanced.