Brownlee shrugged off a stomach bug, which meant brother and Olympic bronze medallist Jonathan didn't make the start-line, to claim one of the hardest races on the circuit in convincing fashion - walking across the line with a 37 second advantage over Spain's Mario Mola.
“If any course is going to be my course, then it's here," said Brownlee, who missed the last race in the World Series in Madrid.
"With a background of hill running and mountain running, this is what I love doing. I got away and then it was about holding my own rhythm.
“Once I was riding there was nothing I could do, my stomach was an absolute wreck. I was on the line, if I went too hard it just hurt too much. I kept a steady rhythm and fortunately it was enough.”
Stimpson claimed her first-ever victory at this level, taking advantage of struggling rivals when the gradient kicked spitefully upwards in the bike section.
She had built up a decisive lead by the run and crossed the line 59 seconds ahead of Australia's Emma Jackson.
She said: “I couldn't believe it. I got to half way and said ‘ok my legs aren't feeling too bad’. People were breathing heavily and I was actually feeling ok.
"I got to 2k and my legs felt ok, and my coach said if you feel ok at 2k let it rip, give it a go. On this course you have to give it a go and it worked out.”
- Sports & Recreation