Open water 2000m / 78.5k / 20k The Bala Triathlon is set in the lakeside town of Bala in beautiful North Wales. The setting is excellent with plenty of space for transition and parking at the nearby rugby club offering additional shower facilities. The swim is in Llyn Tegid, which is approximately 10 miles in circumference (wet suits compulsory). The bike section is a challenging out and back course, while the run is undulating following the road around the lake.