About this waterfall.

About Poplar Rapids

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I used to call this site 'Observatory Rapids', but switched it out when I saw the name on mapsbyjeff.com Jeff knows the park WAYYYY better than I do! This cluster of rapids is just upstream from where the river discharges to Lake Traverse. I haven't visited, but suspect that exploration on foot is possible. Jeff's map indicates that there is a small waterfall here.

There are several sizeable islands in the river, which causes the river to split into several larger channels, and possibly several more small ones. The second largest island is crossed by Achray Rd, meaning there are at least two channels crossed by the road.

Additional channels are found upstream, probalby just out of view. All have rapids. It's impossible to use aerial photography to tell exactly what is available to see. If you visit, please lett me know what we can find.

I used to use the term Observatory Rapids because otf the Algonquin Radio Observatory, located just 500 m to the south. The driving coordinates lead to a parking lot at the western edge of Lake Traverse, not far from the rapids.

This site is coded yellow because I have never visited and cannot confirm that it is easy to visit the rapids. While they are fairly close to the road, conditions may or may not be suitable for access by ground.

Some Key Facts
Region Northeast
County Nipissing
Near Lake Traverse
Watercourse Petawawa River
Watershed / % Lakes 3 / 23%
Ownership Algonquin Provincial Park
Landscape Wilderness, roadside
Size Small
Type Rapids
Modification Natural
Access Moderate
Top / Bottom /
Trail conditions
Hiking Time
Coordinates 45.9599,-78.0666
Site ID WOO.NIP.058
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Finding Poplar Rapids


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Visiting Poplar Rapids

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Waterfalls of Ontario Project

This project has been online since 1999, in print since 2003, and on social since 2011. (See archives: 2003, 2012, 2018). It was the first to inventory and map Ontario's waterfalls for recreational purposes. With your continued help, it grows. Learn more...
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This page last updated on April 20, 2024. Earlier versions can be examined on Archive.org, dating back to 2003.