Hannah Attenburrow took first place in her first-ever endurance race.
The Petersfield talent won the Merida Summer Monkey mountain bike race.
It was a trip into the unknown with a six-hour solo battle as 200 cyclists competed.
Attenburrow, 27, is more used to lining up for short-course cross-country races.
But she took to the new discipline very well and topped the podium on her debut.
Attenburrow said: ‘I was keen to try an endurance race as after speaking to my coach we felt I may be more suited to longer distances.
‘I spend a lot of time on my bike around the South Downs training and use the trails at Queen Elizabeth Country Park regularly.
‘The six-hour race really suited me. I paced myself and enjoyed the single-track sections.
‘I was delighted to finish top of the podium in my first endurance race and it has given me the incentive to keep with the rigorous, time-consuming training schedule needed for this racing.’
Attenburrow added: ‘Thank you to Bike Fixers Portsmouth for keeping my bike in tip-top condition.
‘Thanks also to Grip Grab, Silverback and Dog Tag for your continued support.
‘Thanks to Headline sponsor Merida Bikes, who laid on a huge prize giving ceremony.’
When Attenburrow is not racing or training herself, she runs Pedal 2 Pedal, a mountain bike club for riders from the age of five to 18.
See the website pedal2pedal.co.uk for details.