The BC Coroners Service says 21-year-old Christopher Humphries of Westlock, Alta., died July 12.
He lost control of his ATV while riding near Kinbasket Lake, about 100 kilometres south of Valemount, west of Jasper National Park.
The BC Coroners Service says Humphries plunged over a 125-metre cliff.
He was pronounced dead at the scene.
The coroner and RCMP continue to investigate the incident.