A bike, run or walk event has so far raised over £1,000 for Magpas Helimedix.
The event was the brainchild of Magpas fundraising assistant Anna Dutton after watching the London Marathon and Great Northern Run.
After a year spent organising the event, it was held at Ferry Meadows with around 70 people taking part.
Mayor of Peterborough Councillor John Peach was there at the start to get things underway with the bikers and runners completing a minimum of 5km and the walkers at least 3km.
Anna said: “I was really pleased with the outcome and the weather was on our side. I’m looking forward to next year.”
The event is scheduled to go ahead for a second time on July 30 2016.