Thousands of Barrie residents will be working together to clean up the city with the annual Spring Into Clean event.
Students will be cleaning up around their schools on Friday.
The waterfront clean up is planned for Saturday from 9-1 at Heritage Park.
And over the weekend more than 700 community members and businesses are cleaning up other public spaces.
Last year more than 15,000 participants collected 6.1 tonnes of litter.