Upper Plym Valley
The Upper Plym Valley is a deeply atmospheric stretch of ancient moorland landscape on the southwestern edge of Dartmoor National Park in Devon, England. Carved by the River Plym as it descends from the high moor, this valley is one of the most historically rich and scenically compelling corridors in the entire national park. It draws together Bronze Age archaeology, medieval tin-working remains, remnants of Victorian industry, and wild natural beauty into a single continuous landscape that rewards unhurried exploration. The area falls within the broader Dartmoor National Park and is managed partly as open access land, making it a compelling destination for walkers, historians, and those seeking genuine solitude away from more crowded moorland sites.
The valley's human history stretches back roughly four thousand years, with one of its most remarkable features being the remarkable concentration of Bronze Age monuments that survive in exceptional condition. Wilsworthy, Legis Tor, and the Erme valley nearby all contain ritual landscapes, but the Upper Plym Valley itself preserves stone rows, cairns, cists, and enclosures that together suggest sustained prehistoric habitation and ceremonial activity on these slopes. The Stall Moor stone row, one of the longest prehistoric stone rows in the world, is accessible from this area, running for nearly three kilometres toward Green Hill. These monuments speak to communities who farmed, buried their dead, and organised their spiritual lives on this moorland edge during a period when southern England's climate was significantly warmer than today.
Medieval and post-medieval industry left equally visible marks upon the valley. Tin streaming and blowing houses along the Plym and its tributaries exploited the alluvial tin deposits washed down from the moor, and the ruins of several blowing houses — where tin ore was smelted — can still be found near the riverbank. The characteristic double-arched structure of a well-preserved blowing house survives near Plym Steps, with its mould stone still in situ, a relic that gives extraordinary material immediacy to the medieval tin trade that made this region economically significant across the whole of southwest England. Later, in the nineteenth century, china clay extraction reached into the margins of this valley, though the upper reaches were spared the most intensive industrial transformation visible elsewhere on the southern moor.
In terms of physical character, the Upper Plym Valley offers a landscape of contrasts that change dramatically with season and weather. The upper valley floor is boggy and open, dominated by purple moor grass, sphagnum mosses, and scattered clumps of rush, while the valley sides rise through bracken-covered slopes to open granite tors above. Lower down, ancient oak woodland clings to the steep valley sides in places, particularly around Dewerstone Rock, where sessile oaks draped with lichen and moss create a primeval atmosphere quite unlike the exposed moorland above. The river itself is a constant companion — fast-moving, peaty brown, and cold even in summer, tumbling over granite boulders and through narrow rock channels with a persistent, companionable sound. On still days, the calls of curlew and skylark carry across the open moorland sections, while the wooded stretches echo with woodland birdsong.
Dewerstone Rock, rising dramatically at the southern end of the valley where the Plym enters a gorge, forms one of the most striking natural features of the entire area. The cliff, popular with climbers, offers views out across the lowland Devon fringe and down toward Plymouth Sound on clear days. In local folklore, Dewerstone is associated with the Devil — or in older Dartmoor legend, the Wild Hunt, the phantom chase of souls across the moor led by the dark figure known as Dewer. These folk traditions root the landscape in a psychogeography as rich as its physical topography, lending the valley its slightly uneasy, haunted quality that many visitors report sensing even without knowledge of the legend.
The surrounding landscape places the Upper Plym Valley within easy reach of several complementary features. Cadover Bridge to the east provides one of the most popular access points and picnic areas on the southern moor, while Shaugh Prior village sits close by and offers the closest community presence to the valley. The Plym estuary and Plymouth lie to the south, meaning the valley sits at the remarkable junction between open Dartmoor moorland and the suburban edge of a major city. This compressed geography means it is unusually accessible for a genuinely wild moorland valley. Nearby Burrator Reservoir, with its Victorian granite dam and surrounding conifer plantations, is only a short drive to the north and offers a contrasting kind of Dartmoor scenery.
For practical visiting purposes, the valley is best approached on foot from Cadover Bridge, which has a small car park and is reached via minor roads from Plympton or the B3416. From Cadover Bridge, paths follow the river northward into increasingly open and undeveloped moorland, while southward routes lead toward Dewerstone and the wooded gorge section. The terrain can be boggy in wet conditions, and the upland sections require appropriate footwear year-round. There are no facilities within the valley itself, so visitors should come prepared with water, food, and navigation tools, as the open moor can disorient in poor visibility. Spring and early summer are particularly rewarding, when the moorland flowers, nesting birds are active, and the river runs with energy after winter rains, though autumn offers its own attractions when bracken turns copper and the light on the granite becomes especially warm and dramatic.
One often-overlooked detail of this valley is its role in the water supply of Plymouth. The River Plym has long been associated with the provision of freshwater to the city, and Sir Francis Drake's famous Leat — a channel constructed in 1591 to carry water from the moor to Plymouth — drew from sources not far from this valley system, though the Drake's Leat itself begins further north near Sheepstor. The whole hydrological relationship between the high moor and the coastal city gives the valley an almost civic significance layered beneath its wild appearance, reminding visitors that Dartmoor's uplands have been managed and valued not only for their beauty or archaeological richness but as working infrastructure sustaining human settlement for centuries.