Wissahickon Creek, Stream in Northwest Philadelphia, Pennsylvania, United States

Wissahickon Creek is a flowing stream that winds through Montgomery and Philadelphia Counties before emptying into the Schuylkill River through a deep limestone canyon. The water passes through a forested valley with steep banks and rocky sections that define the landscape.

During the 1700s, the creek powered many mills, including the first paper mill in America, which was built here by William Rittenhouse. This early industrial use shaped the region's economic development for generations.

The name comes from a Lenape word referring to fish or the water's color, connecting this stream to the region's indigenous heritage. Today, residents and visitors use the valley for walking and outdoor activities, making it a gathering place for the community.

The creek can be reached through Wissahickon Valley Park, which has walking paths and viewpoints along the water. Visitors should wear sturdy shoes, and anyone wishing to fish needs the proper licenses.

The creek's landscape includes Wissahickon schist, a distinctive rock type that became a popular building material in Philadelphia during the 1800s. This shiny stone is still visible in many of the city's older buildings today.