Located in California’s Eastern Sierra, Mono Lake is a majestic body of water covering over 65 square miles. It is an Ancient lake, over 1 million years old — one of the oldest lakes in North America. It has no outlet. It’s a vital habitat for millions of migratory and nesting birds. Tufa towers, calcium-carbonate spires and knobs formed by interaction of freshwater springs and alkaline lake water. The lake is 2 1/2 times as salty as the ocean and very alkaline.