The Horseshoe Curve is a 3,485-foot (1,062 m) triple-tracked railroad curve on the Norfolk Southern Railway's Pittsburgh Line in Logan Township, Blair County in the U.S. state of Pennsylvania. It is close to 1,300 feet (400 m) in diameter and has a grade of almost 2 percent. As a train travels west from Altoona, it ascends almost 60 feet (20 m) in the 0.66-mile (1.06 km) segment that makes up the curve and rotates 220 degrees.