Clarks Knob is a summit in

Franklin County, Pennsylvania Franklin County is a county in the Commonwealth of Pennsylvania. As of the 2020 census, the population was 155,932 Its county seat is Chambersburg. Franklin County comprises the Chambersburg–Waynesboro, PA Metropolitan Statistical Area, whi ...

. It is the highest point on Blue Mountain, the eastern front range of Pennsylvania's

Ridge and Valley Appalachians The Ridge-and-Valley Appalachians, also called the Ridge and Valley Province or the Valley and Ridge Appalachians, are a physiographic province of the larger Appalachian division and are also a belt within the Appalachian Mountains extending ...

region.

Geography

Clarks Knob's northeast-southwest running summit ridge forms the boundary of the Susquehanna River and

Potomac River The Potomac River () drains the Mid-Atlantic United States, flowing from the Potomac Highlands into Chesapeake Bay. It is long,U.S. Geological Survey. National Hydrography Dataset high-resolution flowline dataThe National Map. Retrieved Augu ...

drainages. It stands over above the town of Chambersburg and the

Great Appalachian Valley The Great Appalachian Valley, also called The Great Valley or Great Valley Region, is one of the major landform features of eastern North America. It is a gigantic trough—a chain of valley lowlands—and the central feature of the Appalachian M ...

. This mountain is protected within the

Buchanan State Forest Buchanan State Forest is a Pennsylvania State Forest in Pennsylvania Bureau of Forestry District #2. The main office is located in McConnellsburg in Fulton County, Pennsylvania, in the United States. The forest also includes tracts in Frankl ...

References

{{Mountains of Pennsylvania Mountains of Pennsylvania Landforms of Franklin County, Pennsylvania