There was extra motivation as the Osterley parkrun celebrated its third anniversary - with cake awaiting participants at the finish line.
Runners had certainly earned the calorific reward, having clocked up a cumulative 62,000km since the weekly run began at the picturesque venue.
Some of those taking part, with a little help from the parents carrying them or pushing their buggies, were even younger than the event itself.
The free run, which takes place every Saturday at 9am, is one of hundreds of 5km parkruns organised by volunteers across the country each week.
But it must be one of the most scenic courses, with participants lining up outside the Grade I-listed Osterley House before running, jogging or walking through the mansion's lavish grounds.
The birthday celebrations coincided with the I AM Team GB campaign, which was launched to encourage people to take inspiration from Britain's Olympic success and get active.
Osterley parkrun director Geoff Miles said as few as 30 people took part when the event first started but it had gradually built a loyal following and now attracted around 120 runners most weeks.
"We get people of all ages and abilities, from six-year-olds to 76-year-olds, and it's a social event for the community," he told getwestlondon .
"We're here every Saturday morning and anyone can turn up and run around the beautiful grounds. What better way could there be to start your weekend?"
In case you were wondering, it's not known how many people recorded a personal best thanks to the incentive of the delicious baked treats, which were provided by the runners themselves.
For more information about the Osterley parkrun and other free runs near you, visit the parkrun website.
