NOT much changes early on a Saturday morning in Warwick.

The runners and walkers are down at Queens Park from 6.30am preparing for the weekly free 5km Warwick parkrun which starts at 7am, just below the rugby union field.

Other than on Pentath-run weekend in May, parkrun starts rain, hail or shine on a Saturday morning.

Run director Katharine Jones said parkrun was a real community event.

"We have a lot of people who began as walkers and are now regular runners,” Jones said.

"It is a run, not a race. Everyone is aiming for their own personal best.

"The first across the line is known as the first finisher, there are no winners at parkrun.”

There have been more than 160 parkruns in Warwick with more than 20 runners being presented with their 100-run shirts.

Shirts are presented after 50 and 100 runs and 25 volunteer roles.

The run each week heads north from the starting point to the weir bridge and proceeds around the river walk past the Aussie Rules and junior rugby league fields, across the Madsen Bridge walkway to the starting point. Each lap is 2.5km.

Some runners like Pat Sinnott often use parkrun as part of their morning run.

He was down as one of the volunteers at a parkrun this month and had already run 13km when he lined up to help out.

Everyone involved in parkrun loves running but once every 10 weeks or so, five give the running a break to volunteer.

There are those who make parkrun their one event/run of the week but others who use parkrun as part of a more serious running regime.

Five parkrunners, Annie Bradford, Judy Gray, Scott Clarkson, Avril Brown and Paul Jones recently completed a 50km run at Blackall Range.

New participants are always welcome at parkrun. All that is required is to go to parkrun.com.au and register. Participants print a barcode which is used to source their time at the end of each event.

The fastest finishers in 160 runs are Matt McDonald (men) and Warwick High student Sophie Follett in women's ranks.