Swatara Gap

Swatara Gap is where Swatara Creek cuts through Blue Mountain, creating a natural passage at an elevation of about 433 feet above sea level. The water has carved through the ridge over time, forming this distinctive opening in the mountain range.

Native American communities used the waterway and built V-shaped stone structures to trap eels for food. This long-established practice shaped the area and gave rise to the place name that survives today.

The name comes from the Susquehannock word Swahadowry, referring to where people gathered to harvest eels. Visitors today can still sense this deep connection to the waterway as they pass through the narrow passage.

The gap is easily accessible via Pennsylvania Route 72 and Interstate 81, both of which pass directly through it. Travelers can view the formation from pullouts and vantage points along these major roads.

Scientists have found rocks from the Upper Ordovician period in the gap that reveal details about ancient sediment layers and fossil formations. These geological layers tell a story stretching back hundreds of millions of years.

Location: Lebanon County

GPS coordinates: 40.47861,-76.52889

Latest update: December 14, 2025 13:07