Half Ironman 70.3 Poznań, The adventure begins in the calm and warm waters of Lake Kierskie. Immerse yourself in the tranquil surroundings as you navigate through the rolling start format, an experience that allows athletes to enter the water in a steady flow. With an average water temperature of 65°F/18°C, the lake provides the perfect setting for a smooth and invigorating swim. BIKE - a 90km bike ride that winds its way around small villages and the western part of the picturesque city of ...