ORANGVILLE,Ont. - Hundreds of protesters continue a 119-kilometre march to Shelburne today in a bid to stop plans for what would be Canada's second largest quarry.

Their journey began at a rally held in Toronto on Friday.

The group of residents, farmers and First Nations Representatives has since passed Orangeville, which marked the half way point of their march.

They say the quarry planned for a site on Highway 124 near Shelburne would destroy prime farmland in Ontario's potato-growing region.

They're also worried about possible damage to local water tables.

The group plans to end their march tomorrow with a big rally at a potato farm next to the proposed quarry site.

Highland Companies has said that any land dug for its proposed quarry would be restored to arable condition.

The Ontario government still must approve plans for the quarry.