It was a hot, clear Sunday morning when small groups of people began gathering on Te Oneroa a Tõhē (90 Mile Beach) at Ahipara, Waipapakauri Ramp and Hukatere.
After a short karakia and safety briefing they were handed feed sacks that Waiharara School pupils had sewn into reusable rubbish bags, and they were off, on the third annual big beach clean-up.
Many of the volunteers had helped before, Jo Shanks said, with a mix of keen locals, DoC staff, the surf life saving club, the 4WD club and community organisations.
"Some locals felt the beach looked pretty clean when they were driving along. Others let us know about spots where parties had left broken bottles, or plastic had turned the beach into a brightly coloured mosaic," she added.
"We were looking for litter trapped in the dunes.