St. Marys Quarry - Historic Places Days

St. Marys Quarry

Saint Marys, Ontario
The St. Marys Quarry, 425 Water Street South, Saint Marys, ON, Canada
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1:00-7:00pm. Pre-booked swim time required.

Rehabilitated for swimming, this former limestone quarry is now Canada’s largest outdoor freshwater swimming pool. This exciting attraction includes cliff jumping and a slide (dependent on water levels) as well as stand-up paddleboard rentals and a water trampoline. There is a large grassed area for picnics or sunbathing, sand volleyball and the Tiki Hut for snacks.

Pre-booked swim times are required in 2021, but the view of the quarry and heritage interpretive plaque can still be enjoyed from outside of the fenced area.


  • Family-Friendly
  • Parking
  • Parkland


The St. Marys Quarry, 425 Water Street South, Saint Marys, ON, Canada
Get directions

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