Greenstone is a large open pit gold mine in the Geraldton-Beardmore district of western Ontario, Canada. The property is located approximately 275 km northeast of the city of Thunder Bay and approximately 4 km south of the town of Geraldton.
An updated Technical Report in 2026 shows Greenstone producing an average of 320,000 ounces of gold per year over the next 10 years (2026-2036).