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Scoop the Poop organiser Antonia Wood, of St Leonards, said the volume of dog faeces collected in compostable bags in the clean-up effort was incredible.
The group also picked up general rubbish, including full bags that appeared to have been tipped down a bank.
The volunteers split the West Harbour Walkway into sections, between Ravensbourne and St Leonards, and set about their task yesterday morning.
Jen South, of Port Chalmers, was a dog owner keen to pitch in.
"There are lots of good dog owners out there," she said.
Dunedin city councillor Steve Walker said it was encouraging to see many people running and cycling on the walkway and some applauded the efforts of the group.
The faeces would be disposed of on Ms Wood’s section.