Bodybuilding’s biggest weekend is back. The 61st edition of the Mr. Olympia contest takes over Las Vegas this October, bringing together the best physiques on the planet for two days of elite competition and fitness spectacle. When and Where Is Mr. Olympia 2025? The 2025 Mr. Olympia will take place from Friday, October 10 to Saturday, October 11 at Resorts World Las Vegas — one of the premier venues on ...