Here is a story I heard from a ranger while visiting Yosemite National Park.

Many, many years ago, a Native American couple live in the desert around Mono Lake.  Learning about the beautiful Valley of Ahwahnee, they decided to go there and make it their home. Along the way, the couple began to argue. The wife wanted to go back, the husband refused. They argued so loudly, the Creator grew angry and turned the two into stone. The husband became North Dome and the wife became Half Dome.  The wife felt bad about the quarrel and the rock she became began to cry, creating Mirror Lake. In Paiute language she is known as T’ssikakka.  And that is the story of how part of Yosemite came to be.  Purrs, Gulliver