The Bellwood Boulder: A Glacial Giant Becomes a Community Landmark in Old Ottawa South
In the heart of Old Ottawa South, a massive piece of prehistoric history has transitioned from a construction site curiosity to a celebrated community landmark. Recently, residents gathered in Windsor Park to unveil new signage commemorating the “Bellwood Boulder,” a glacial erratic that provided an unexpected source of social connection during one of the most isolating periods in recent history.
- The Discovery: The boulder was unearthed in April 2021 during water pipe replacement on Bellwood Avenue.
- Geological Origin: It is a glacial erratic deposited in the region approximately 10,000 years ago.
- Community Impact: The rock served as an informal gathering spot for residents during COVID-19 lockdowns.
- Permanent Recognition: Educational signage was installed in Windsor Park on May 8 to preserve the rock’s history.
From Infrastructure Work to Geological Discovery
The “Bellwood Boulder” did not arrive in the neighborhood by design. It remained hidden beneath the surface of Bellwood Avenue for millennia until April 2021. At that time, city crews replacing water pipes unexpectedly uncovered the massive stone, bringing a piece of the Ice Age into the modern urban landscape.
Geologically, the rock is known as a glacial erratic. These are pieces of rock that differ from the size and type of rock native to the area in which they rest. They were carried by glacial ice over long distances and deposited when the glaciers melted—in this case, roughly 10,000 years ago.
A Pandemic-Era “Water Cooler”
While the boulder’s geological significance is clear, its social value emerged during the COVID-19 pandemic. As residents of Old Ottawa South faced lockdowns and social distancing, the giant rock, which sat on the dug-up road for several weeks, became an unlikely sanctuary.
Gauri Sreenivasan, a resident of Bellwood Avenue, described the boulder as a focal point for the neighborhood. “It was like the water cooler,” Sreenivasan noted, explaining that neighbors would chat around the rock and some would even climb it despite the dirt from the construction. For a community stuck at home, the boulder became a catalyst for public engagement and a shared experience.
Preserving the Legacy in Windsor Park
To ensure the story of the boulder is not lost, new informative signs were installed in Windsor Park on May 8. These signs serve a dual purpose: providing public education about the area’s glacial history and acknowledging the rock’s role in bringing the community together.

During the unveiling ceremony, Sreenivasan emphasized the importance of the installation, stating, “This boulder has a lot to tell us,” and noting that the sign provides a vital point for both “public education” and “public engagement.”
Frequently Asked Questions
What is a glacial erratic?
A glacial erratic is a piece of rock that differs from the size and type of rock native to the area in which it rests. They were transported and deposited by glaciers thousands of years ago.

Where can the Bellwood Boulder signage be found?
The commemorative signage is located in Windsor Park in the Old Ottawa South neighborhood.
When was the boulder discovered?
The boulder was uncovered in April 2021 during municipal work to replace water pipes on Bellwood Avenue.
Looking Forward
The installation of the Windsor Park signage transforms the Bellwood Boulder from a temporary curiosity into a permanent part of the neighborhood’s identity. By blending geological science with local human history, Old Ottawa South has created a landmark that honors both the ancient movements of the earth and the resilience of a community during a global crisis.