St. Marys Quarry Claimed


The St. Marys Quarry is Canada’s largest outdoor freshwater swimming pool.  Enjoy beach volleyball, cliff jumping (subject to water levels), a water trampoline, Tiki Hut snacks, two rafts, a slide and stand up paddleboarding.

Bike racks and life jackets available – Free parking across the street


June 13, 14, 20 and 21, 2020: 1:00 – 5:00 p.m.

June 26 to September 7, 2020: 1:00 – 8:00 p.m.

St. Marys Quarry Admission Fees
Type Single
Child/Youth (3-18) $4.50
Adult $7.00


How was the Quarry constructed?
The quarry was constructed in the mid-1800s. Workers used dynamite to extract limestone blocks until the 1930s. Between 1930 and 1935, the quarry filled with water and was used as a popular swimming spot by the locals. In 1945, the town bought it and the adjoining Thames Quarry along with 50 acres of surrounding land for $2,200.