Featherstone is in early stages of Alzheimers and is having additional memory loss due to a recent fall which caused a concussion.
He is in town visiting family who live in the 4300 Block of West Kirkland Ave, San Tan Valley next to the mountain.
PCSO Air Unit, Posse members along with S&R are responding.
UPDATE 8:32PM JULY 6, 2012
The missing person, originally identified as a 73 year old, was found walking a couple blocks from home. He was sun burnt and slightly dehydrated but will be okay.
He had been hitching rides with various motorists throughout the day, making it hard to locate him.
(Age was initially reported to PCSO as 73, he is 63)