Mounties say the crash happened at about 5:30 p.m. PT Friday at the Mason Mine Site Forest Service Road.
A 22-year-old female who had been a passenger on the ATV was pronounced dead at the scene. The ATV driver, a 20-year-old woman, sustained minor injuries.
The 19-year-old male driver of the SUV and his 16-year-old passenger were not injured.
Police say alcohol is not believed to be a factor but investigators are looking into the possibility that speed may have contributed to the crash.