Connecticut is rich with train and trolley history, and a lot of commuters still rely on the rail to get to the city. But before the major lines were established, building a tunnel through a mountain was a standard procedure for connecting towns. What’s left of this abandoned tunnel in Connecticut is perfect for biking and hiking, as spending time inside will expose you to cool air and give you a shady safe haven from the sun. You have to check it out!

The Steep Rock Railroad Tunnel was constructed in nine months between 1871 and 1872 in Washington Depot. You'll find it hiding within the 974-acre Steep Rock Preserve, making it an ideal place to visit for outdoorsy types looking for a truly magical hiking experience.
criana/Flickr
This was considered an extremely fast project during the time, and the fact that it was completed so quickly was deemed incredible by all involved.
The tunnel was made for the Shepaug Valley Railroad and extends 235 feet.
Steep Rock Association/Facebook
The coal miners who built the tunnel actually hailed from Pennsylvania. They used picks, dynamite, and nitroglycerin to blast through Steep Rock Ridge, creating a curved tunnel that runs directly through the ridge. This made it possible to travel from Washington Depot to New York within a day.
In the winter season, the tunnel ices over, creating a slippery walkway.
criana/Flickr
As one of Connecticut’s coolest hidden attractions, we'd recommend visiting during every season just to see the difference and to capture awesome photos. Even when the inside of the tunnel is difficult to traverse, the outside and views are still beautiful.

Related Stories

You'll Never Look At Donuts The Same Way After Trying Neil's Donuts In Connecticut

You'll Never Look At Donuts The Same Way After Trying Neil's Donuts In Connecticut

 This Speakeasy Hidden Behind A Secret Passcode In Connecticut Is Perfect For A Date Night

This Speakeasy Hidden Behind A Secret Passcode In Connecticut Is Perfect For A Date Night

 This Enchanting Garden Restaurant In Connecticut Will Transport You To Another World

This Enchanting Garden Restaurant In Connecticut Will Transport You To Another World
The view of the path from the tunnel's entrance is like something out of a fairy tale.
criana/Flickr
But don't let this straight path fool you! The path the train followed was anything but direct, earning the motto of "the crookedest railroad east of California." However, it served its purpose as a vehicle for transporting milk and cheese into New York City.
The moment you enter the tunnel you're immersed in complete darkness.
Steep Rock Association/Facebook
Having three passenger cars, two baggage and mail cars, and 23 freight cars, it was clear that speed and trade were the primary concerns of this tunnel. So, subjecting passengers to a bit of darkness was probably no big deal — not to mention that lighted bridges were a bit of a rarity. But, this tunnel helped provide the stone for the Brooklyn Bridge. So, don't let the dark scare you. This place is anything but haunted!
A flashlight reveals the chiseled bedrock walls and stunning proof of man's labor.
criana/Flickr
Most folks agree that the strangest thing about this place is how narrow it is. You almost can't believe that a train could possibly fit! Icicles and stalactites hang from the ceiling, and small pools of water collect around the edge. You may even see some drill holes from where the dynamite was placed.
The railroad ceased operation in 1948, but that doesn't mean you can't still experience it!
criana/Flickr
This is your chance to find the light at the end of the tunnel ... literally! Walking straight through takes less than a minute, but why not linger a little longer? After all, you'll be standing in a tunnel where trains used to run and on a trail that used to be covered in tracks. Talk about a historical destination! To learn more about Steep Rock Railroad Tunnel, visit the Steep Rock Preserve's website!

This place leaves me speechless. If you liked this abandoned tunnel in Connecticut, see some more hidden gems! Or, if you just like visiting abandoned places, check out this abandoned Christian-themed park!

OnlyInYourState may earn compensation through affiliate links in this article. As an Amazon Associate, we earn from qualifying purchases.

More to Explore

abandoned tunnel in Connecticut

Elisa Regulski | March 07, 2022

Which state parks should I visit in Connecticut?

If you’re looking for the best state parks in Connecticut, we know just where you should go. For starters, head over to Hammonasset Beach State Park in Madison. The glistening waters and lovely trails will fill you with joy. We also love visiting Sleeping Giant State Park in Hamden. This gorgeous place is full of history, and it’s perfect for nature lovers. Lace up your hiking boots and hit the trails! Nothing beats a nice afternoon outing at this beloved state park. Last, but not least, check out Harkness Memorial State Park in Waterford. This area is home to some of the most stunning botanical gardens in Connecticut.

What are the best waterfall hikes in Connecticut?

The journey to Blackledge Falls is one of the best hiking trails in Connecticut. Located in Glastonbury, this area is nothing short of spectacular. Best of all, this hike will only take you fifteen minutes. It’s a great afternoon adventure for young ones. Watch their eyes light up in wonder as you weave through Connecticut’s blissful nature. Chapman Falls, located inside Devil's Hopyard State Park in East Haddam, is another fantastic place to visit. This trail is also short and sweet, so it’s perfect for the entire family. To learn more about these walkways, check out our list of the best easy waterfall hikes in Connecticut.

What are the creepiest places in Connecticut?

If you’re a fan of the paranormal, you’ll have no trouble finding some spooky places in Connecticut. In fact, there are so many bone-chilling places that we created a road trip full of them! This journey weaves through cemeteries, haunted historic buildings, and abandoned towns. Check out our full article to learn more about this haunted road trip through Connecticut.

Related Articles

Featured Addresses
2 Tunnel Rd, Washington Depot, CT 06794, USA