On Sunday athletes competed in the 2016 Columbia Threadneedle Investments Boston Triathlon—known for being Boston's only triathlon.

2016 Boston Triathlon
Michael Doyle, 60, gets ready for the start.
2016 Boston Triathlon
Bing Wang, 28, prepares for the swim.
2016 Boston Triathlon
Violet is all smiles as she gets ready to start the Olympic swim.
2016 Boston Triathlon
Steven Columbo, 27, looks ready to start the Olympic swim.
2016 Boston Triathlon
29 and under women crash into Dorchester Bay at the start of the Olympic Tri.
2016 Boston Triathlon
The men’s 35-39 age group dive in for the Olympic swim.
2016 Boston Triathlon
The men’s 35-39 age group dive in for the Olympic swim.
2016 Boston Triathlon
Olympic swim waves navigate race course bouys as rescue crews keep watchful eye.
2016 Boston Triathlon
Near the end of the swim in Dorchester Bay.
2016 Boston Triathlon
Women 29 and under exit Dorchester Bay.
2016 Boston Triathlon
2016 Boston Triathlon
2016 Boston Triathlon
2016 Boston Triathlon
David Schwarz, 48, exits the water on the way to T1.
2016 Boston Triathlon
Carlos Heil leads a group of athletes out of the water onto Carson Beach.
2016 Boston Triathlon
Avery Palardy, 23 of Dorchester, exits the swim course and races past other athletes on the way to T1 and winning the 20-24 age group.
2016 Boston Triathlon
An athlete runs up the beach to T1.
2016 Boston Triathlon
Jocelyn Charlton, 27, sets up in transition prior to race.
2016 Boston Triathlon
Bryan O’Rourke, 41, does another lap of the Olympic bike phase.
2016 Boston Triathlon
2016 Boston Triathlon
Madeline Spinks of Brighton has energetic supporters
2016 Boston Triathlon
Olympic distance athletes run in Moakley Park
2016 Boston Triathlon
2016 Boston Triathlon
Margaret Smith takes water as she begins run in Olympic.
2016 Boston Triathlon
Violet Chang happily runs through Coakley Park in Olympic race.
2016 Boston Triathlon
Dave McGillivray, race director of Boston Marathon, runs to third in his age group in sprint.
2016 Boston Triathlon
Young finish line supporters bang the noisemakers.
2016 Boston Triathlon
Jeffrey Cain, 52, turns to the finish line in Olympic as Genevieve Nave follows.
2016 Boston Triathlon
A sprint to the finish
2016 Boston Triathlon
Matthew Giambrone of Boston digs in for the finish in the Olympic.
2016 Boston Triathlon
Kate Jackso Hobbs, 34 of Boston finishes the race.
2016 Boston Triathlon
A medal awaits its finisher.
2016 Boston Triathlon
Brian Brulez, 28 of Kansas City, finishes the Olympic race.
2016 Boston Triathlon
Sean Murphy hugs Genevieve Nave, both of South Boston, at finish line after completing the Olympic race.
2016 Boston Triathlon
Quant Le, 41 of Dorchester, finishes the Olympic-distance race.
2016 Boston Triathlon
Caitlin Campbell congratulates Kaitlin O’Brien after finishing the Olympic-distance race.
2016 Boston Triathlon
Bryan Lyons pushes Rick Hoyt across the finish line.
2016 Boston Triathlon
Lucas Pozzetta of Merrimack, NH get the Olympic-distance win in 1:44:30.
2016 Boston Triathlon
Pro Angela Naeth breaks the finish line tape in 1:53:27 for the win.
2016 Boston Triathlon
Angela Naeth receives her $750 paycheck for the win.
2016 Boston Triathlon
Philippe Malcolm gets some medical attention for his ankle.

Photos: Kevin Morris

On Sunday athletes raced in the 2016 Columbia Threadneedle Investments Boston Triathlon—known for being Boston’s only triathlon. Competing in either the sprint- or Olympic-distance races, athletes swam in the fresh waters of Dorchester Bay, cycled through the Boston city streets and then ran along the scenic Southie shoreline. Lucas Pozzetta and Angela Naeth earned the Olympic-distance victories, while Jonathan Ingalls and Darby Middlebrook were first to cross the finish line in the sprint races.

Complete results here