Full Distance Triathlon Korea – Gurye: Conquer Nature’s Challenge Swim – 3.9 km in Guman Reservoir Swim in the clear, calm waters of Guman Reservoir at Jirisan Lake Park, with stunning views of Jirisan Mountain and tranquil surroundings. Average water temperature: 73°F (23°C). Bike – 180 km of Scenic Rides Cycle along the Seomjingang River and Jirisan Mountain. Enjoy fresh forest air, picturesque hot spring villages, and a safely controlled course. Run – 42.2 km of Serenity Finish strong ...