Mount Antoine is a downhill ski area located in Northeastern Ontario, Canada, north of Mattawa. It boasts the record for the longest ski run in Ontario, stretching 2.9 kilometers. The mountain offers 15 perfectly groomed runs, a vertical drop of 630 feet, and breathtaking views from its two elevated peaks. With a main chalet, rental building, and Canadian Ski Patrol quarters, Antoine Mountain provides a comprehensive skiing experience.