Breezewood,
Pennsylvania

Tunnel Elevation:

approximately
1,277 feet
--------------------------

The tunnel sets 640 feet below
the summit of Sideling Hill.

Sideling Hill Summit - 
Blue Ridge Mountain, 
an elevation of 2,195 feet.

Highway sign on 
U.S. Route 30, going over the top of Sideling Hill.

At a length of 6,782 feet, 
the Sideling Hill tunnel
was the longest of the 
original seven tunnels on 
the Pennsylvania Turnpike. 
 

LENGTHS OF THE 
ORIGINAL TURNPIKE TUNNELS*:

Sideling Hill
6,782 feet

Allegheny Mountain
6,070 feet

Tuscarora Mountain
5,326 feet

Kittatinny Mountain
4,727 feet

Laurel Hill
4,541 feet

Blue Mountain
4,339 feet

Ray's Hill
3,532 feet

Following the Sideling 
Hill tunnel's permanent closure in 1968, the Allegheny Mountain 
tunnel became the 
longest of the original 
seven tunnels, still
in operation. 

Sideling Hill's 
counterpart tunnel, 
Ray's Hill, is by contrast,
the shortest of the 
original tunnels.  

Total length, as designed  
by the never-completed  
South Penn Railroad:   

6,662 feet

Current Ownership:

Southern Alleghenies Conservancy

Visitation Permitted?

Interior Lighting:

NONE.

Due to the slight crown in the center of the tunnel, you cannot see light from either end once 
you reach a certain point.

  

You cannot even see your 
hand in front of your face.

     

According to a published and very credible source, I have learned the answer to the speculation as to whether or not the Sideling Hill Tunnel was boarded up by the Pennsylvania Turnpike Commission following it's closure in 1968.  Yes, both portals of the Sideling Hill Tunnel were indeed boarded up by the P.T.C. between the years of 1973 and 1988.  The boards were placed at the point on the inside of the tunnel portals where the rounded face of the portal changed to the flat concrete roof.

In 1988, the boards were removed and the tunnel was opened for use as part of a testing facility for the "rumble" strips that border our highways today, among other uses, including sign reflectivity tests deep within Sideling Hill's total darkness. 

When the P.T.C. concluded their temporary usage of the tunnel, they did NOT re-board the tunnel this time.  Unfortunately, this helped vandals easily gain access and break glass, graffiti the walls and leave their trash in the control rooms and vents at the tunnel's portals. 

This photograph was taken in August 1970.  The turnpike commission continued to perform maintenance on the Ray's Hill and Sideling Hill tunnels even following their closure in 1968.  The reasons for such maintenance really is not clear. 

This photograph is one of very few I have found anywhere, including the Internet, the Library of Congress, or in printed form of Sideling Hill Tunnel, with the original name of the tunnel visible and up-close. 

You can find this photo, along with a lot of history and other photos in the Mitch Dakelman/Neal Schorr book "Imagines of America:  The Pennsylvania Turnpike."  This book is available on Amazon.com.  A link to it can be found on the main page of this website.
 

Click on the link to the left to visit the Pike-2-Bike Trail's website.  They offer up-to-date information on the trail availability as well as guided tours and information about the trailheads and where to best access the trail.

For the other abandoned tunnel statistics pages, please select one
of the following links or click on e-mail us regarding any questions,
comments or updates you may have regarding Sideling Hill Tunnel: