Panoramic view of Harpers Ferry from Maryland Heights, with the Shenandoah (left) and Potomac (right) rivers. (This is a cropped version, excluding the non-rectangular border which resulted from stitching.)
Panoramic view of Harpers Ferry from Maryland Heights, with the Shenandoah (left) and Potomac (right) rivers. (This is a cropped version, excluding the non-rectangular border which resulted from stitching.) — Photo: Mark Fickett | CC BY 3.0

Potomac Highlands

regionwest-virginiaappalachiamountainswikivoyagefossil-hunting
5 min read

Drive a back road in the Potomac Highlands of West Virginia and your phone will likely go quiet. Some of that is just terrain - ridges that block any radio signal trying to climb out of a hollow. But across the southern part of the region, the silence has a federal source. The United States National Radio Quiet Zone covers about 13,000 square miles straddling the West Virginia-Virginia border, restricting most radio transmissions to protect the Green Bank Observatory's ability to listen to the universe. The result, for visitors, is that cell phone service across much of the southern Highlands is mostly nonexistent. Only the Allegheny Mountain Radio network, broadcasting at low power on a handful of FM rebroadcasting stations, fills the airwaves. The mountains here keep their own counsel - by both geology and statute.

Eleven Counties, One Interstate

The Potomac Highlands stretch across eleven counties of eastern West Virginia, where the Allegheny Front meets the Ridge-and-Valley country and produces some of the most rugged terrain in the eastern United States. Travel here is dominated by two-lane state and county roads winding along ridge spines and creek bottoms. The only interstate is I-81, which clips through the eastern edge near Martinsburg and helps explain why that city is in many ways more connected to Hagerstown, Maryland than to Berkeley Springs, just up the road. Counties that look adjacent on a map can be hours apart by road. The lack of interstate access has held back development but has also preserved the kind of unhurried, scenic driving experience that brings visitors back.

Towns Strung Along the Ridges

The cities and towns of the Highlands each cultivate their own identity. Berkeley Springs, on the eastern edge, leans into its history as a spa town and arts haven - the natural mineral springs there have drawn visitors since the eighteenth century. Davis, in Tucker County, is the highest incorporated town in West Virginia at 3,520 feet of elevation, with the cold winters and short summers to match. Romney, founded in 1762, is generally regarded as the oldest town in West Virginia. Harpers Ferry, where the Shenandoah meets the Potomac, draws Civil War visitors to the site of John Brown's 1859 raid. Shepherdstown perches scenic on the bluffs over the Potomac, close to Antietam Battlefield across the river in Maryland.

The Monongahela Inside the Highlands

The Monongahela National Forest occupies a substantial portion of the Highlands - over 921,000 acres of forest stretching from near Elkins to Richwood. Within those bounds lie some of the most distinctive landscapes in the eastern United States: Seneca Rocks, with its 900-foot Tuscarora quartzite climbing wall; Spruce Knob, the highest point in West Virginia at 4,863 feet; the heath barrens of Dolly Sods; and the Cranberry Glades, with their boreal-like bogs more typical of Canada than central Appalachia. The headwaters of six major rivers - the Monongahela, Potomac, Greenbrier, Elk, Tygart, and Gauley - begin within the protected lands here. The rain shadow of the Allegheny Front means the west side of the high country gets twice the precipitation of the eastern slopes.

Fossil Hunting on the Roadside

For anyone willing to bring a hammer and a careful eye, the Highlands hold a startling abundance of fossils. Devonian-age road cuts and quarries from Wardensville to Upper Tract to Yellow Spring expose layers laid down when shallow tropical seas covered what is now Appalachia. Trilobites of the genera Phacops, Trimerus, and Coronura show up well-preserved. Brachiopods, crinoids, corals like Favosites helderbergiae, and the ammonoid Agoniatites turn up regularly. At some sites, including one west of Wardensville, certain specimens have been replaced with pyrite - fool's gold versions of creatures that died here roughly 400 million years ago. The Tonoloway Formation near Romney holds well-preserved coral. The Mahantango Formation, exposed at multiple sites, holds the greatest diversity. Check for private land before collecting, but the rocks themselves are willing teachers.

Driving in the Weather

The Highlands' weather earns respect. A clear valley can sit beneath a ridge wrapped in fog, and conditions can change abruptly when a road crests a pass. Rain, snow, fog, and high winds catch drivers off guard regularly. Even modest snowfall can pile into large drifts on exposed ridges, while ice forms early and stays late at higher elevations. Local advice is consistent: check the forecast, leave a margin, and slow down before the road turns. Amtrak's Capitol Limited stops at Harpers Ferry on its run between Washington and Chicago, and MARC commuter trains from Washington serve Harpers Ferry and Martinsburg, but for the bulk of the Highlands, getting around still means driving the slow, scenic roads - the kind the Highlands were built for.

From the Air

The Potomac Highlands region covers roughly 38.6 to 39.6 degrees north and 78.5 to 80.0 degrees west, in eastern West Virginia. Best viewed from 6,000 to 10,000 feet AGL where the ridge-and-valley structure becomes legible. Notable visual features include the Allegheny Front (eastern escarpment), Seneca Rocks (quartzite wall), Spruce Knob (4,863 feet, highest point), and the Cranberry Glades. Major airports include Elkins-Randolph County (KEKN), Greenbrier Valley (KLWB), and Cumberland Regional (KCBE). Note the National Radio Quiet Zone restrictions in the southern part of the region. Mountain wave and rapidly changing weather are common; afternoon convection builds quickly in summer.