Triangle Rock

Nestled along the picturesque North Fork South Branch Potomac River, near the town of Petersburg, West Virginia, is the unique Triangle Rock. As its name aptly suggests, this geological wonder boasts a rock formation that, in a fascinating twist of nature, mirrors the shape of a triangle.

North Fork Mountain, the imposing backdrop for this formation, forms a part of the renowned Wills Mountain Anticline system. This ridge system spans several states, beginning in Pennsylvania and meandering through Maryland, and West Virginia, and reaching into the heart of Virginia. ts striking silhouette emerges from the southern landscape of the North Fork gap, a renowned water gap located near Cabins. This mountain further breaks down into intriguingly named ridges like the Devil’s Backbone, Brushy Mountain, and Monterey Mountain towards its southern terminus.

What makes North Fork Mountain spectacular is its cap of Tuscarora quartzite or sandstone. This resilient layer of Silurian rock stands up against erosion, resulting in west-facing cliffs and several sizable outcrops. The verdant forests surrounding Triangle Rock are a lush mix of sugar maple, beech, and yellow birch hardwoods, punctuated by stretches of towering red pines. The cliffs of North Fork Mountain, with their bare sandstone edges, give rise to unique ecological niches, including the delicate silvery nailwort and the pristine white alumroot. Adding to this botanical display are the chestnut oak and the Table Mountain pine, often sighted just beyond the cliff edges.

Triangle Rock

Triangle Rock


From Petersburg, follow WV Routes 28 and 55 west and south for 13.5 miles. From Seneca Rocks, follow WV Routes 28 and 55 north for 8.4 miles. There will be a gravel pull-off on the east side of the road.


Triangle Rock Weather

American Byways is an exploration-focused website that helps you discover hidden gems, find unique waypoints, and trek to spectacular natural wonders.


  • Ray Geroski

    August 23, 2023

    Great profile of a hidden gem. I’ve passed by this many, many times and only stopped for the first time on a recent trip to visit family. It was always the kind of thing I and my children would take pictures of and say, “Wow! That’s cool!”
    Interestingly, on the same day we pulled over to check it out and take pictures another couple also stopped. They said they often travel through the area and like to stop in.

  • Angela Davis

    August 31, 2023

    If you are traveling by canoe, do not try to enter this mini cave. You will not get out because the river pool sucks you in and will not let you get out. The local fire department can pull you out. This is on the Grant/Pendleton County line, so ask for Petersburg.

  • Natalie Swiger

    September 1, 2023

    So many great memories of this place. When I was a kid, my grandparents had a camp right in front of this rock. After the flood of 85 washed it away they moved the camp across the road, so we still spent most of our summers here swimming and fishing. Every time we are down that way now, I have to stop and go down to the water. It’s my happy place 🙂

  • September 3, 2023

    Will Be Putting This On My Locale Sight Seeing List! Thanks For Sharing.


Leave a Comment