Use of Rock Dunder Nature Reserve is restricted to supporters of the Rideau Waterway Land Trust and guests who accompany them. People can become a supporter of the Rideau Waterway Land Trust for as little as $10.

Rock Dunder is a treasure that lies within the internationally recognized Thousand Islands Frontenac Arch Biosphere Reserve.Rising 275 feet above Morton Bay, with trails leading to one of the highest points of land in the area, Rock Dunder provides breathtaking views of the surrounding lakes and woodlands. The trails and vistas are enjoyed seasonally, by both local residents and visitors to the area. For many, childhood memories of hiking trips to Rock Dunder still remain fresh in their minds.
Located at the portage leading to the Gananoque River system and down through the heart of the UN Biosphere, Rock Dunder provides a natural rest for canoeists traveling the Rideau Waterway.
The Land Trust volunteers have been working hard to make improvements to the trails and repairs to the two log cabins which provide a brief rest stop for hikers.

Please obey the following access rule!   “Open sunrise to sunset, May 15 to Nov 15”.

The lands are open sunrise to sunset May 15 to November 15.They are closed to all visitors at all other times.

Further information on this Nature Reserve may be found on the website of the Rideau Waterway Land Trust

Rock Dunder Nature Reserve is just one of the many nature trails and hiking trails you can find throughout Ontario by using the search features of

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Rock Dunder Nature Reserve characteristics

Length: Not known
Difficulty: Moderate (Trail classifications)
Trail surface: Natural
Trail use: Hiking
Accessibility Notes: Not wheelchair accessible.
Fees: Donation box at trailhead.

Flora & Fauna:

Not reported yet

Amenities: None

Attractions: Panoramic View

Rideau Waterway Land Trust, 613-305-3507. Website:

Find it: Rock Dunder is located just south of Morton. Take Stanley Lash Lane and go 1200 metres from Hwy #15 to trailhead.

GPS Coordinates (main trailhead):
Latitude: 44.5316980
Longitude: -76.2041760

Rock Dunder Nature Reserve Image Gallery

Photo credits:

Don Knight