Earth Observatory Science Earth Observatory Pennsylvania’s Grand Canyon Earth Earth Observatory Image of the Day EO Explorer Topics All Topics Atmosphere Land Heat & Radiation Life on Earth Human Dimensions Natural Events Oceans Remote Sensing Technology Snow & Ice Water More Content Collections Global Maps World of Change Articles Earth Matters Blog Blue Marble: Next Generation EO Kids Mission: Biomes About About Us Subscribe 🛜 RSS Contact Us Search October 25, 2026 NASA Earth Observatory/Michala Garrison North-central Pennsylvania is canyon country with an Appalachian flair.
Pine Creek Gorge reaches depths of about 1,500 feet (460 meters) along its gently curving path through the forests of the Allegheny Plateau . Instead of the steep rock walls characteristic of canyons in the desert Southwest, lushly vegetated slopes outline the dramatic topography.
In autumn, greens give way to a palette of reds and golds sought out by leaf peepers. Nicknamed the “Grand Canyon of Pennsylvania,” t
Pine Creek Gorge reaches depths of about 1,500 feet (460 meters) along its gently curving path through the forests of the Allegheny Plateau . Instead of the steep rock walls characteristic of canyons in the desert Southwest, lushly vegetated slopes outline the dramatic topography. In autumn, greens give way to a palette of reds and golds sought out by leaf peepers.
Nicknamed the “Grand Canyon of Pennsylvania,” the gorge runs for some 45 miles (72 kilometers) from Ansonia south to Pine Creek’s confluence with the West Branch Susquehanna River, reaching its greatest depths around Waterville.
The OLI (Operational Land Imager) on the NASA-USGS Landsat 8 satellite captured this image of Pine Creek Gorge on October 25, 2026, when colorful fall foliage was on display. Glaciers played a key role in the canyon’s formation, though ice itself did not carve it. Pine Creek once flowed to the north , opposite of what it does today.
As glaciers advanced into the region from the northeast during the last ice age, they dammed the river and filled the valley with lakes. Those lakes eventually overflowed, sending water streaming to the south.
North-central Pennsylvania is canyon country with an Appalachian flair. Pine Creek Gorge reaches depths of about 1,500 feet (460 meters) along its gently curving path through the forests of the Allegheny Plateau . Instead of the steep rock walls characteristic of canyons in the desert Southwest, lushly vegetated slopes outline the dramatic topography. In autumn, greens give way to a palette of reds and golds sought out by leaf peepers.