Just a bit of the setting sun shining on Half Dome's face...

Rising nearly 5,000 feet above the Valley floor, it is one of the most sought-after landmarks in Yosemite.

Half Dome was originally called "Tis-sa-ack," meaning Cleft Rock in the language of the local Native Americans.
Tis-sa-ack is the name of a mother from a native legend. The face seen in Half Dome is supposed to be hers.
Tis-sa-ack is the name of a Mono Lake Paiute Indian girl in the Yosemite Native American legend. John Muir referred to the peak as "Tissiack".