Authorities in Grand Canyon National Park, Arizona, are continuing their search for Martha Anne Overholser, a 66-year-old woman from Michigan who was reported missing.
According to National Park Service officials, Overholser was last seen at Mather Point on the South Rim of the Grand Canyon on December 10. She was part of a commercial bus tour but did not return as scheduled.
It is believed that Overholser may have walked west from Mather Point towards either Bright Angel Lodge or Hermits Rest.
Overholser resides in Sault Ste. Marie, Michigan, which is located near the Canadian border.
A missing person’s flyer has been issued by park officials in an effort to locate her.
