Major update after doctor missing for three months in Western Australia

Police have renewed calls for help locating a doctor who disappeared three months ago while hiking with a large group after a possible surprise sighting.

Police have issued an update about a doctor who vanished three months ago while hiking along a popular track with a large group of people.

Dr Nathalie Casal advised her family in December last year that she would be hiking the Bibbulmun Track with a group of people and may be out of contact for some time.

The Bibbulmun Track is a long distance 1000km trail which stretches from Kalamunda, east of Perth, to Albany.

Police believe the 71-year-old may have started her walk from Mundaring, a popular starting point for many of the walking tracks in the area east of Perth.

Police are searching for Dr Nathalie Casal, 71. Picture: WA Police

She has been missing for three months. Picture: WA Police

She has not been seen since she set off for the hike in December, more than three months ago.

Western Australian Police received information Dr Casal may have stopped in Northcliffe for supplies on the afternoon of March 14.

Police are urging people in the area between Northcliffe and Walpole to report any sightings.

Dr Casal is described as being approximately 157cm tall, of slim build, with short grey hair and brown eyes.

Anyone who has seen her, or has any information about her whereabouts, is urged to

contact police immediately on 131 444.