Full Distance Triathlon Korea – Gurye Experience Korea’s only full-distance triathlon in the breathtaking natural beauty of Gurye County, known as the "Road to Nature." This race features a scenic course surrounded by lush mountain forests, pristine rivers, and tranquil farmland. Swim (3.9 km): Held in Guman Reservoir at Jirisan Lake Park, swimmers enjoy clear waters surrounded by Jirisan Mountain, charming villages, and picturesque landscapes. Average water temperature: 73°F (23°C). Bike ...