The event featured triathalons, duathalons, a Coast to Coast build-up featuring a 14km kayak, as well as other swimming, aqua biking and kayaking events.
President of Southland Triathalon Club Ginge Brunett said 20 years had flown by.
"It makes me feel old, because I was here when we started it up.
"It was great, though, had a lot of support from the MLT over the past 20 years," he said.
Over 100 people came out to race, and Mr Brunett said it was a good event for all skill levels.
"There’s all sorts really, from your weekend warriors to the guys who are very serious.
"Archie Richie who won the long race, he’s training for Ironman, and Robert Huisman won the sprint distance and he’s a very good triathlete as well.
"We have people from those very good athletes to just people giving it a go," he said.
Mr Brunett said triathalons were a great way to keep active and the three distinct aspects can help increase the difficulty but keep it engaging.
"It makes the training quite varied and breaks things up quite a bit compared to the sports where you’re just doing the one thing all the time.
"That makes it a bit harder as well, because you have to be efficient in swimming biking and running, but that’s what people like," he said.
Mr Brunett said the event was in a great location, allowing for plenty of people to get their triathalon fix.
"Gore is a great spot for it.
"It’s a reasonably easy drive for people from Dunedin or Queenstown.
"There’s a great lake, a river nearby and the Croydon Lodge is a great place to finish.
"It’s modern, can get a coffee, it’s awesome.
"The way the course is set up, too, it’s a lap bike and run course, spectators can sit on the grass at Croydon lodge and watch their friends race by," he said.
Mr Brunett gave credit to all the sponsors and the volunteers who help make the event happen.
