Half Distance Triathlon São Paulo: A Thrilling Challenge in Brazil's Vibrant Heart. Swim: A Scenic Start in Guarapiranga Reservoir The triathlon begins with a 1.9-kilometer (1.2-mile) swim in the serene waters of the Guarapiranga Reservoir, surrounded by lush greenery and stunning views. With water temperatures averaging 24°C (75°F), it offers the perfect balance of challenge and comfort to kick off the race. Bike: A Demanding 90-Kilometer Ride Next is a 90-kilometer (56-mile) cycling route ...