Kittanning Gap
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Kittanning Gap is a gap at the summit of Allegheny Ridge in central Pennsylvania in the United States. It is located approximately 5 mi (8 km) west of Altoona.
In the 18th century the Kittanning Path passed through the gap, providing a route between central and western Pennsylvania for Native Americans and early white settlers. It was later selected as the site for a railroad line across the Allegheny Mountains. The challenge of constructing a railroad through the ridge led to the construction of the unique Horseshoe Curve in 1854, now designated as a National Historic Landmark.