Ontario’s full of shimmering lakes and well-loved beaches—but if you’re craving something more offbeat, it’s time to dive into the province’s natural swimming holes. From cliff-lined lagoons to waterfall-fed basins, these wild swimming spots offer adventure, seclusion, and serious bragging rights. Ready to chase the plunge? Here are 10 swimming holes across Ontario that belong on your summer bucket list.

1. The Grotto – Bruce Peninsula National Park

Arguably the crown jewel of Ontario’s natural swimming scene, The Grotto is a turquoise cave carved into the Niagara Escarpment. Accessible by a short hike through Bruce Peninsula National Park, this spot fills fast in summer—so book your day-use permit early.

2. Elora Quarry – Elora

Once a limestone quarry, Elora Quarry is now a 40-foot-deep swimming hole surrounded by vertical cliffs and forest. It’s managed by the Grand River Conservation Authority and has a beach, change rooms, and a cap on daily visitors—making it equal parts wild and safe.

3. Canoe Lake Rock Jump – Algonquin Park

Hidden inside Algonquin Provincial Park, Canoe Lake’s cliff jump spot isn’t marked on any official map—but locals and park veterans know the way. Paddle out and look for the sloped rock face where daring swimmers launch into deep water.

4. High Falls – Muskoka

Located near Bracebridge, High Falls offers multiple cascades and a natural basin perfect for swimming. With sandy shoreline and accessible parking, it’s one of Muskoka’s best-kept summer secrets.

5. Decew Falls – St. Catharines

This Niagara Region gem features an upper and lower falls with trails winding around the gorge. Decew Falls is for the adventurous—expect uneven terrain and a bit of bushwhacking, but you’ll be rewarded with cool, waterfall-fed water.

6. Kakabeka Falls Pool – Thunder Bay

While you can’t swim in the actual falls (they're massive), the Kakabeka Falls Provincial Park area has river spots downstream that are safe and peaceful for a dip. The scenery? Top tier.

7. The “Sooke Hole” – Sudbury Region

Unofficial and completely local, the “Sooke Hole” (named by those who know it) is a rocky plunge pool near Sudbury with clean water and solitude. Locals keep it close to the chest—but hint: follow old ATV paths north of the city.

8. Devil’s Rock Lookout – Temiskaming Shores

Cliff diving enthusiasts seek out this towering escarpment near Lake Timiskaming. While Devil’s Rock itself is a hiking destination, the shoreline below offers warm, clear waters and dramatic cliffs. Be cautious—no lifeguards and sheer drops mean it’s not beginner-friendly.

9. Marble Lake – North Frontenac

Calm, clear, and surrounded by rugged forest, Marble Lake is lesser-known and ideal for those wanting a full-day float or a peaceful afternoon swim with no interruptions.

10. Cascades Conservation Area – Thunder Bay

The Cascades are a series of fast-moving water channels over rock ledges. Some sections offer small pools perfect for cooling off while listening to the soothing sound of rushing water. Bring water shoes—it’s slippery but serene.

If you’re looking to upgrade your beach day, these natural swimming holes deliver. From rugged wilderness plunges to scenic hideaways, Ontario’s wild waters offer a whole new way to explore the province. Just remember—these aren’t chlorinated pools. Check local safety conditions, leave no trace, and keep the adventure wild but respectful.