A large quantity of rubbish, including many recyclable items, was collected on Castlecliff Beach during the Whanganui District Council Youth Committee's clean-up afternoon.
The event, on Saturday, was to celebrate New Zealand Sea Week.
District Councillor Josh Chandulal-Mackay estimated 50-60 people took part.
"I was really impressed with the turnout," Mr Chandulal-Mackay said.
"We had a number of elderly people and young families. It was a nice family afternoon."