Authorities are actively searching for a woman from Michigan who has been reported missing at the Grand Canyon National Park.
Officials with the National Park Service stated that Martha Anne Overholser, aged 66, was last spotted at Mather Point on the South Rim of the canyon on December 10. She failed to return from a commercial bus tour afterwards.

It is believed that Overholser may have headed west from Mather Point, possibly aiming for Bright Angel Lodge or Hermits Rest.
Overholser resides in Sault Ste. Marie, Michigan, which is situated close to the Canadian border.
In an effort to locate her, park officials distributed a missing person’s flyer on Thursday.