Lake Tahoe’s surface area is 193 square miles, and its shoreline is 72 miles long. Lake Tahoe’s depth is up to 1,685 feet, with an average of 989 feet. The lake’s surface elevation is 6,229 feet above sea level. To help you grasp the size of Lake Tahoe, it’s waters could cover the state of California to a depth of 14.5 inches!