Huntingdon is a borough in (and the county seat of) Huntingdon County, Pennsylvania, United States. It is located along the Juniata River, approximately 32 miles (51 km) east of Altoona and 98 miles (158 km) west of Harrisburg. It is the largest population center near Raystown Lake, a winding, 28-mile-long (45 km) flood-control reservoir managed by the U. S. Army Corps of Engineers. The borough is located on the main line of the Norfolk Southern (formerly Pennsylvania) Railroad, in an agricultural and outdoor recreational region with extensive forests and scattered deposits of ganister rock, coal, fire clay, and limestone. Historically, the region surrounding Huntingdon was dotted with iron furnaces and forges, consuming limestone, iron ore and wood (for charcoal production) throughout the 19th century. Dairy farms dominate the local agriculture. The town is a regular stop for the Amtrak passenger service which connects Harrisburg with Pittsburgh.