Green Lake Triathlon Calendar Tickets Add to Calendar Add to Timely Calendar Add to Google Add to Outlook Add to Apple Calendar Add to other calendar Export to XML When: July 19, 2020 @ 7:00 am – 1:00 pm 2020-07-19T07:00:00-05:00 2020-07-19T13:00:00-05:00 The Green Lake Triathlon attracts racers from all over the Midwest. The course includes a lake swim in the deepest inland lake in Wisconsin, rolling hills on the bike and secluded run course making this triathlon perfect for beginners to veterans.