The last time a full triathlon was held at Mount Batten was 2015. Since then Plymouth Tri Club have organised an annual aquathlon at the same venue.
But cycling will be back at the event in 2018 to make it a standard open water triathlon.
There will be a 1,500m swim in Plymouth Sound, followed by a challenging 40km bike ride out to Modbury and then a two-lap 10k run.
The event will be held on Sunday, July 15, and will also incorporate the South West Junior Aquathlon Championships.
Places are still available and entries can be done online HERE.
Meanwhile, four Plymouth Tri Club athletes completed the Lanzarote Ironman event at the weekend.
The event, which took place in hot and windy conditions, attracted nearly 2,000 competitors.
Mark Davidson was the first Plymouth Tri Club athlete to finish. He clocked 11 hours, 42 minutes and 22 seconds to take 23rd in his category and 322 overall.
Neil Minion was not far behind in 11:49.44 to take eighth in his category and 356 overall.
Mike Taylor clocked 12:10.29, while Matt Searl finished in 14:28.41.