popular fundraiser for breast cancer research in Calgary is no more.

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A group of Calgarians walking to raise money to fight cancer in the 2012 event. (CBC)

The Alberta Cancer Foundation won't be holding The Weekend to End Women's Cancers — a two-day 60 kilometre walk usually held in July.

Organizers say participation rates have been slowly dropping.

Kathie Geleta, who has taken part in the walk for the past six years, says she didn’t see the cancellation coming.

"I was surprised and very sad," Geleta said. "It had been an extremely emotional journey for my family and me and my friends. The first year it was just my two daughters — a very cathartic experience, I think we cried for all 60 kilometres."

Since 2005, the walk has raised more than $47 million across Canada for cancer research and helped cover the cost of two mobile digital mammography units in Alberta.

The walk will take place this year at events in Montreal and Toronto.