Eramosa Karst: Discover Caves on These Beautiful Hiking Trails

Eramosa Karst Conservation Area in Hamilton, more specifically Stoney Creek, is a fascinating place to go for a hike. It's home to some of the best hiking trails in Hamilton. There are multiple loop trails at this park, operated by the Hamilton Conservation Authority. You can visit on a couple of occasions and take a different path each time.

After taking a hiking trip to Eramosa Karst, I'm going to show you how to plan your day there. I'll show you the best route to take that has the most interesting natural features. For those interested in the geology of the area, I'll go into some detail about the intriguing caves, crevices and sinkholes you'll see along the way.

Map of Eramosa Karst Conservation Area

Here is a map of Eramosa Karst Conservation Area. Please feel free to reference this map photo when you visit the park (or take your own photo of the map at the park's entrance). I found it helpful to use this AllTrails map as I walked around the park, although I kept referencing the park's map to make sure I didn't miss any of the natural features.

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The Unique Features at Eramosa Karst

Eramosa Karst Conservation Area is a unique place to hike around the Niagara Escarpment. In some places around the Niagara Escarpment, you'll find karsts. Karsts are geologic formations that occur when soluble rocks, such as dolostone rocks found here, dissolve and form underground caves and sinkholes.

Dolostone is a sedimentary rock very similar to limestone. "Karst" is a Slavic word meaning barren and rocky ground. Another place to hike that has a section of karst is Limehouse Conservation Area near Halton Hills.

In 2003, Eramosa Karst was designated as an Area of Natural and Scientific Interest by the Ministry of Natural Resources. It has 16 different karst features, the largest number out of any single area in Ontario. These karst features include soil pipes, sinkholes, dry valleys, sinking streams, and a 335 metre-long cave. The cave here is the 10th longest in the whole province. Several of the karst features are provincially significant.

How did karst come to be? About 13,000 years ago, after the last glacier retreated this land, surface meltwaters and underground streams slowly carved out this landscape. As the water slowly dissolves the soluble dolostone, you'll see holes that appear in the rocks themselves. The drainage system sustains the karst and showcases this natural erosion throughout its various stages of development. (sinkholes, springs, sinking streams, karst windows, etc.).

Flora and Fauna at Eramosa Karst

In addition to the karst landscape, the remainder of Eramosa Karst Conservation Area is made up of forests and meadows within the Davis Creek watershed. Some of the trees you may spot are sugar maple, ironwood, hawthorn, gray dogwood, white ash, black cherry, American beech, red oak, butternut and shagbark hickory.

In terms of wildlife, there are many species of mammals, reptiles, amphibians, birds and insects. You may be able to see wild turkeys, coyotes, deer, rabbits, meadow voles, red-tailed hawks, indigo buntings, savannah sparrows and saw-whet owls.

Hiking at Eramosa Karst Conservation Area

When I went hiking at Eramosa Karst Conservation Area, I stuck primarily to the main orange trail, the Karst Features Trail. I walked the lengthier 2.5km trail without taking any of the connection trails.

The Meadows Trail and Bobolink Trails both have local access points to the surrounding neighbourhoods. You may end up taking these trails if you wish to extend your hike or you're walking to the park from a nearby neighbourhood.

The Karst Features Trail is the most popular path at Eramosa Karst Conservation Area. There are many geologic formations and highlights on the way. I'm going to create a separate section for each one with more details and photos.

Pottruff Spring

As the water slowly dissolves the dolostone underground, it forms an underground channel that the water runs through. Pottruff Spring is an area where this underground river becomes visible at the surface.

Pottruff Cave

After centuries of erosion, the water slowly erodes the rock away to form underground passages. The ceiling eventually collapsed, leaving the opening to Pottruff Cave. As water continues to flow through Pottruff Cave, the cave will gradually become larger and larger over time.

Phoenix Creek Sink

Underground streams that surface as springs can dip back down underground at sink points. This same stream that surfaces as Pottruff Spring dips down into the Phoenix Creek Sink. This photo was taken after a heavy rainfall, so you aren't able to see the sink point.

Stewart Creek Sink

Much like Phoenix Creek Sink, Stewart Creek Sink is another sink point with water flowing from the Stewart Creek (rather than the Phoenix Creek).

Nexus Cave Entrance

The Nexus Cave Entrance is a place where you can look down into the Nexus Cave. Interesting fact: when the Hamilton Conservation Authority acquired this land, there was a man living in the Nexus Cave Entrance! He had chairs, food and a stove down there with him.

Nexus Cave Window

The Nexus Cave Window is another vantage point where you can look down into the Nexus Cave. The cave opening is at the base of a large tree.

Blue Hole Sink

The Blue Hole Sink can be viewed from a wooden boardwalk across the sink point. I wasn't able to see the sink point from the boardwalk as there was plenty of plant growth covering this area.

Pottruff Homestead

The Pottruff family once lived on this property. They used the rocks from Eramosa Karst to build homes and barns. The family also cut down some trees for farm land and moved rocks, though they took very good care of the land itself. It's one reason why we're able to enjoy this natural space nowadays.

If you're looking for the Pottruff Homestead, you won't be able to find much of it left. There are a few rocks left from the foundation of the house, just off the trail.

Plan Your Visit

Eramosa Karst Conservation Area is located on Upper Mount Albion Road in Stoney Creek. There is an $8 parking fee to park in the Eramosa Karst Conservation Area lot, though it may be possible to park elsewhere for free and walk in. You can also purchase an annual Hamilton Conservation Authority Membership Pass and you will receive free entry into HCA areas.

There is a restroom building at Eramosa Karst beside the parking lot with clean and modern facilities. You can bring your pets to Eramosa Karst, though please keep dogs on a leash at all times. Remove dog waste from the trail and dispose of it in the garbage. Please follow proper trail etiquette, including "pack out what you pack in".

Tick Warning at Eramosa Karst

Eramosa Karst has higher reports of ticks than other trails in the Hamilton area. It's safe to assume that most trails throughout southern Ontario have ticks, and you should take precautions to protect yourself against them.

Sticking to the marked trails and out of tall grass is a good way to avoid ticks. It's always a good idea to check yourself for ticks after completing a hike. Please note that most people with issues allow their dogs to run freely off-leash and into the bushes. HCA advises that you keep your dog on a leash at the park. It's best to keep your dog on the marked trail to avoid ticks.

I highly recommend that you take the time to familiarize yourself with our handy guide, "How to avoid ticks while hiking". Be proactive and arm yourself with this useful information. Then, you can feel confident hitting the trails!

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