On Monday, the B.C. Coroners Service identified the victim as Angela Elizabeth Johnson, of Cluculz Lake.
RCMP officers were called to the scene of the crash on Jardine Road in the Cluculz Lake area on Saturday afternoon.
North District RCMP spokeswoman Const. Lesley Smith said police believe Johnson was the sole rider of the ATV when the accident happened, sometime just after 3 p.m. PT.
"Preliminary investigation shows that the lone female rider was attempting to negotiate a turn in order to turn around but the quad tipped over and she was fatally injured," Smith said.
Johnson was taken to St. John Hospital in Vanderhoof, about 37 kilometres to the northwest of the accident site, where she died from her injuries.
The B.C. Coroners Service is continuing to investigate the incident.