Waugh finished in three hours 31.30 seconds after the swim, cycle and run – 20 seconds clear of fellow Briton, Georgia Taylor-Brown, who came second in Friday’s race and seventh in the overall standings.
She added: “Going on to the last lap I felt the floor starting to tilt a bit and I was like, ‘Oh, I’m in trouble now’.
“I just held it together and then Georgia was putting me under pressure and I luckily just got across the line.”
Success capped a remarkable debut season at the 100-kilometre distance for Waugh, who won her first T100 race in Singapore and finished on the podium in all six of her appearances.
She had moved up to the longer distance – the T100 is almost twice the Olympic triathlon distance of 51.5 km – for a fresh start after her disappointing 15th-placed finish at Paris 2024.
T100 races consist of a 2km swim, 80km bike ride and 18km run, with the tour including eight global stops. An athlete’s best four results, plus their finish in the final, determined the overall standings.
