Hundreds of race fans took to Old Razorback Road on Sunday for the annual Cawdor Billy Cart Rally.
Drivers of all ages took to the track for the popular event.
Throughout the day racers climbed the hill and rode down in pairs to race.
Organiser Alison Lee said drivers could even enter on the day.
“A big crowd of Macarthur locals and visitors cheered on our billy carts and watched the demonstration by the winners of the Red Bull Sydney Billy Cart Race in their amazing Harbour Bridge Billy Cart,” she said.
“There was food stalls and other stands selling goodies.
“It was a great day out for the whole family.”
The event was held from 9am to 3pm.