She may have a dog with her.
The police became aware of the woman's disappearance at lunchtime on Monday and began searching for her in the afternoon.
The search has been going on all night with no results so far.
- In addition to the police's giants with, among other things, helicopters and dogs, we have the help of mountain rescue groups, the simulator and drones, says Michael Liljenberg, officer at the police's regional command center, when we reach him on Tuesday morning.
The search for the 80-year-old woman continues during the day.