A mother and her 10-month-old daughter have been killed by a grizzly bear in Canada's Yukon territory, a coroner said.

The bodies of Valerie Theoret, 37, and 10-month-old Adele were found by the child's father Gjermund Roesholt at the family's remote cabin around 3pm on Monday.

Coroner Heather Jones said Ms Theoret and Adele appeared to have been out for a walk in the remote wilderness sometime between 10am and 3pm when the attack occurred.

Ms Theoret, originally from Quebec, was on maternity leave from her job as a primary school teacher at a school in Whitehorse, the Yukon's only city.

The family, described by friends as competent bush people, had spent the last three months trapping at Einarson Lake, more than 250 miles northeast of Whitehorse.

Mr Roesholt was on the family's trapline when the attack occurred, the coroner said in a statement. He returned just before 3pm and was immediately charged by a grizzly bear, assumed to be the same animal, about 100 metres away from the cabin.