Half Distance Triathlon Portugal - This unforgettable triathlon in Cascais showcases the stunning Portuguese Riviera, featuring: Swim: A 1.9 km (1.2 mile) single-loop swim in the protected Ribeira Beach bay, with breathtaking views and enthusiastic crowds. Water temperatures in October range from 17-19°C (62.6-66.2°F). Bike: A scenic 90 km one-loop ride through the Sintra-Cascais Natural Park, along Guincho Beach, and iconic Lisbon landmarks like the Tower of Belém and 25th of April Bridge. ...