Last Updated on 9 March, 2026 by Robyn Dockendorf
Indiana Dunes National Park contains some pretty epic hikes, and the Cowles Bog trail ranks near the top! The diversity of the trail makes it one of the most memorable hikes in the park, and certainly one of our favorites!
The Cowles Bog Trail is an epic 5-mile adventure in Indiana Dunes National Park featuring sweeping views of Lake Michigan, challenging dune climbs, and plantlife so diverse it was designated as a National Natural Landmark.
This article will prepare you to hike the Cowles Bog Trail by offering information on where to park, how long the trail is, what to expect on your hike, and any cool stopping points along the trail.
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What’s Special About The Cowles Bog Trail?
The Cowles Bog Trail is located in Indiana Dunes National Park in northwest Indiana in Porter County. The park consists of some 16,000 acres and over 50 miles of trails. Intertwined within the National Park is the Indiana Dunes State Park, another wonderful area to explore.
So, what makes Cowles Bog Trail so special and worth the trip?
Outstanding Plant Diversity
In 1965, Cowles Bog was designated a National Natural Landmark due to its plant diversity. Before this, it was a major study area of Dr. Henry Cowles, for whom the trail is named. His work captured national attention, leading to the much-needed preservation of the Indiana Dunes. Cowles Bog is still the focus of many scientific studies to this day.
There are over 400 species of plants that can be found around Cowles Bog, from towering trees to tiny ferns. Some of the plant species you’ll encounter include:
- Spicebush
- Witch Hazel
- Red Osier
- Blackberry
- Columbine
- Jewel Weed
- Mayapple
- Cattails
Unfortunately, the once-common purple pitcher plant has been poached beyond restoration and no longer exists in the area. If you’re interested in plant ecology, this is a wonderful trail to explore. Even if you’re not, this is still an intriguing trail with a variety of plants.
Distinctive Habitats
While this 5-mile trail is predominantly a wetland woods, it also crosses several distinct habitats, including swamps, ponds, black oak savannas, a beach, marshes, and dunefields.
As you meander along the trail, you’ll notice subtle differences in the surface beneath your feet, starting with packed dirt and ending with loose sand. The middle of the trail features towering trees that cast shade in every direction, while the end of the trail has you standing in loose sand on the beach.
Dog-Friendly
National Parks are sticklers about letting dogs on trails. Luckily, the Cowles Bog Trail is dog-friendly! The only rule is to keep your dog on a leash at all times. This protects vulnerable plant life, the wildlife, and is a show of respect toward other hikers and dogs.
If you decide to bring your pup along for the adventure, check out our articles on dog hiking gear and what to bring on a hike with your dog to make sure you’re fully prepared!
By the way, Indiana Dunes isn’t the only National Park that’s dog-friendly. You can head over to our article on dog-friendly National Parks for a look at the National Parks in all 50 states and their pet policies.
Not only do you get to explore several distinct habitats, but you get to bring your furry pal with you! What could be better?
Where To Park For The Cowles Bog Trail
Let’s get this hike started by figuring out where to park for the Cowles Bog Trail. You have two options: the Cowles Bog Parking lot or the Greenbelt parking lot (also referred to as the North Mineral Springs Road parking lot).
When we hiked the trail, we opted for the Cowles Bog parking lot. It was easy to get to, and we didn’t have to pay a park fee to get there. You can find a Cowles Bog Trail Map from the National Park Service here to help you visualize the trail and see the two parking lot options.
Cowles Bog Parking Lot
The Cowles Bog Trail parking lot is somewhat small, so it’s recommended to get there early because this is a popular trail. The parking lot is down a gravel entrance road located off North Mineral Springs Road.
- Parking Lot Location: N41.6452, W87.0846
Just before the turn onto the gravel road is a security gate for Dune Acres, a private neighborhood. You do not need to go through the security gate, but you will likely be stopped by the personnel working the gate.
All you have to do is tell them you’re here to hike the Cowles Bog Trail, and they’ll direct you to turn right onto the gravel road. The gravel road is in great condition and can be accomplished with any vehicle.
Greenbelt Parking Lot (North Mineral Springs Road Lot)
Another option is to park at the beginning of North Mineral Springs Road in the Greenbelt Lot and hike the Greenbelt Trail. This adds approximately 1.4 miles to your hike (0.7 miles each way).
- Parking Lot Location: N41.6369, W87.0870 or 1184 N Mineral Springs Rd, Dune Acres, IN 46304.
If you choose this route, your hike will be a loop instead of a lollipop loop, and you will miss out on about 0.7 miles of wetland. However, you won’t have to deal with the guardhouse if you decide to park here (not that it’s terribly inconvenient).
Now that you’re parked, it’s time to hit the trail! Our article on day hiking gear gives you a list of everything you might need for a hike on the Cowles Bog Trail.
Hiking The Cowles Bog Trail
The Cowles Bog Trail is pretty easy to navigate with only a few clearly-marked intersections. The trail is a mix of packed dirt, boardwalk, and loose sand.
I highly recommend wearing high socks, extra clothing layers, and hiking shoes to prevent too much sand from getting into your shoes. Either way, prepare to have a little sand in your shoes by the end of it! If you decide to hike the Cowles Bog Trail in the winter, check out our winter hiking article for tips on staying cozy yet cool on winter adventures.
From the Cowles Bog Trail parking lot, head back down the gravel road towards North Mineral Springs Road.
Once you reach North Mineral Springs Road, cross it to reach the beginning of the Cowles Bog Trail.
Continue on the trail, noting how each side of the path is bursting with plant life, marshes, and swamps.
Near the 1-mile mark, you’ll come to the first intersection. It’s recommended to do the loop counterclockwise, which is what we chose to do. That means hanging a right at this first intersection, following signs for the beach.
The 1.4-mile mark is the next intersection, which includes a shortcut trail that leads back toward the Greenbelt parking lot and the Cowles Bog Trail parking lot.
If you want to complete the trail in its entirety, take a right here, again following signs for the beach. If you’d rather not climb the steep sand dunes or visit the beach, you can take the left to shorten the loop and return to the parking lot.
To recap:
- Left = back to the parking lot
- Right = to the dunes and beach
As you continue on the trail, you’ll eventually reach the dunefield, but this isn’t your typical dunefield. Instead of being exposed out in the open, this dunefield is hidden within the forest! You’ll notice the trail turns from packed sand to loose sand.
Eventually, the trail will open up, and you’ll see the open shores of Lake Michigan. As you head towards the water, you’ll pass by a trail on the left –this is the way back!
Before you head back, make sure to enjoy the shoreline, stick your toes in the sand, and take in the beautiful, sweeping views around you. People often pack a lunch to have on the beach, so plan ahead of time for any snacks you might want by reading our article on the ultimate guide to hiking snacks!
As for us, we just enjoyed watching Pawdrick run up and down the beach and made him pose for a bunch of photos as if he were our child (which he is!).
After enjoying the views, it’s time to head back to the car. Remember that trail I pointed out earlier? Head back that way and take the trail, which will now be on your right.
Around the 2.4-mile mark, the trail starts cutting away from the beach and back into the forest. Continue on the trail until you reach the 2.8 to 3-mile mark, depending on how much meandering you’ve done.
Here, you’ll want to head to the right toward the Greenbelt Parking Lot.
A little over a half mile later (we were at 3.6 miles at this point), you’ll come to another intersection. This is where the Greenbelt Trail meets up with the Cowles Bog Trail.
Hang a left here, following the sign for the Cowles Bog Parking Lot.
As you approach the 4-mile mark, you’ll return to the first intersection that started it all! Go straight here to head back toward Mineral Springs Road.
When you reach the road, cross and head back down the gravel road to the parking lot. Celebrate with some victory drinks or, if you started at dawn like we did, pancakes!
Wrapping Up The Cowles Bog Trail
The Cowles Bog Trail is an astounding 5-mile hike packed with some of the most unique ecosystems, plants, and views. From wetlands and marshes to dunes and beaches, this hike has it all.
One of the most interesting things about this hike is the plant diversity and habitats. However, having the turnaround point be at the sandy shores of Lake Michigan doesn’t hurt either!
The Cowles Bog Trail is dog-friendly, so feel free to bring your canine companion. Just be sure they are always on leash to be respectful to other hikers and other adventure dogs that may not be as friendly.
Until next time, give your furbag an extra pet from us and keep exploring our beautiful National Parks! For more trail tips and hiking guides, check out the Dirtbags with Furbags hiking blog!
