The Bonnechere Caves, located along the Bonnechere River between the communities of Douglas and Eganville, offer a unique underground adventure for those seeking a one-tank trip from Ottawa. This natural limestone cave system, formed over 500 million years ago, features stunning rock formations, underground streams, and fossilized marine life.
What to Expect at the Caves
Visitors can take guided tours that last approximately one hour, winding through narrow passages and spacious chambers. The caves maintain a constant temperature of around 10°C, so a light jacket is recommended. Highlights include the "Crystal Chamber" with its sparkling calcite deposits and the "Fossil Room," where ancient sea creatures are embedded in the walls.
According to CTV News Ottawa reporter Dylan Dyson, the caves are a hidden gem in the Ottawa Valley. "It's a chance to see a part of Ontario's geological history that's usually hidden from view," Dyson said. "The guides are knowledgeable and make the experience both educational and fun."
Planning Your Visit
The Bonnechere Caves are open from May to October, with extended hours during the summer months. Admission prices are $20 for adults, $15 for seniors and students, and $10 for children under 12. Group rates are available for parties of 10 or more. The site also features a picnic area, a small museum, and a gift shop.
To reach the caves from Ottawa, take Highway 17 west to Renfrew, then follow County Road 58 to Douglas. The drive takes about 1.5 hours, making it an ideal day trip. Nearby attractions include the Bonnechere River for canoeing and fishing, as well as the historic town of Eganville.
Why Visit Now
With summer in full swing, the caves offer a cool escape from the heat. The 2026 season has seen increased interest, with more visitors booking tours in advance. "We've had a record number of reservations this year," said a cave spokesperson. "People are eager to get outdoors and explore something different."
The caves also host special events, including candlelight tours and fossil hunts for children. For more information, visit the Bonnechere Caves website or call their booking office.
