Menzel Centennial Provincial Nature Reserve protects one of the largest open and treed fens in southeastern Ontario, offering a 4.8 km hiking trail in Greater Napanee. This botanically rich site features 19 distinct natural habitats surrounding Mud Lake, providing a sanctuary for rare wildlife and spectacular wetland views for nature enthusiasts.
Menzel Centennial is an 800-hectare nature reserve built around the protection of rare fens, botanically rich wetlands that form in shallow depressions where groundwater meets the surface. The reserve centres on Mud Lake, a shallow water body ringed by 19 distinct natural habitats. Species like the Olive Hairstreak butterfly and Cooper’s Hawk use the reserve, and the concentration of habitat types in a relatively small area makes it unusual for this part of Ontario. It has operated quietly for years, known mostly to those who seek out this kind of landscape on purpose.
What to Expect
There are no facilities here, so come prepared for a proper walk in the woods. The 4.8 km trail passes through swamp forest and opens up to wide views across the lake-wetland complex, where the variety of plant and bird life is visible even from the path.
Here’s What’s Different
- It protects one of the largest examples of rare open and treed fen in southern Ontario.
- The reserve supports rare species including the Olive Hairstreak butterfly and Cooper’s Hawk.
- 19 different natural habitats are concentrated around the shallow basin of Mud Lake.
Good to KnowÂ
- There are no facilities on site. Bring your own water and pack out all waste.
- Spring visits can be bug-heavy due to the extensive wetland systems. Come prepared.
- LOCAL TIP
Pair your hike with a visit to the Camden Lake Provincial Wildlife Area nearby for a full day of birding.
- FAST FACTS
- The reserve covers a total of 800 hectares.
- The trail system was officially launched in 1993.

Your Route
What We Offer
Common Questions
The main loop is 4.8 km long and focuses on the botanically rich wetland views.
The path involves natural wetland terrain and is best suited for hiking rather than strollers.
While it is a great place for a picnic, there are no developed tables or facilities.
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Getting Here
Roblin, ON K0K 2W0
Located on Roblin Road, approximately 7.5 km west of County Road 41 near Roblin. Follow signage for the reserve entrance.