This may be old news, but Sierra Wave provided a little more information about the hiker and the situation:

Quote:
The 13-year-old son of a Mammoth Lakes Emergency Room doctor remained missing in the Sierra mountains at last word - the subject of a two-day search.

Last night, Mammoth Lakes friends of Dr. Rick Shedd prepared to pack up and go help look for his son, Austin Shedd. At last word, they were on stand-by. Dr. Shedd had reportedly hiked down to Independence from the Baxter Pass area Monday where other relatives awaited word.

According to friends of the doctor, he had stopped to make a sandwich for his son during their hike, and when he finished his son was gone. The doctor and a hiking partner searched for the boy. Dr. Shedd finally hiked down to the Owens Valley to get help. The hike itself involved high elevations in the backcountry above Big Pine and Independence.

Inyo Search and Rescue is not working the boy's disappearance at last report. The Sequoia-Kings Canyon National Park was reportedly conducting the search.