Achi news desk-
She was then in contact with the family at around 6.30pm but it is not known where she was at the time.
It is understood Ms Molloy was trying to make her way back to the Dibidil area and may have become disoriented.
Officers are becoming increasingly concerned for her welfare and are appealing for information from the public to help find her.
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She is described as around 5ft 8in tall, of average build with long gray hair.
Ms Molloy was last seen wearing a turquoise water jacket, red trousers, brown walking boots, a blue hat and red gloves.
She was carrying a gray rucksack.
Inspector Graham Brown said: “Mary is a keen hill walker but from what we have been told she may have become disoriented and failed to follow the route she had planned.
“We have specialist resources, including mountain rescue teams, a helicopter and search dogs, in the area but we also need the public’s help with information.
“I would appeal to anyone who was on Rum yesterday and who thinks they may have seen someone matching her description to come forward. Also, anyone who may have recognized Mary’s intended route or the areas she was keen to visit is encouraged to contact us.”
Anyone with information should contact Police Scotland on 101 quoting reference 3149 of May 25.
