The Jurassic Coast is a coastal World Heritage Site whose cliffs expose a record of more than 185 million years, from the Triassic through the Jurassic and Cretaceous periods. For Ray and Moth, walking its length is both a return to the sea after months inland and an encounter with a landscape where geological time, human history and the immediate demands of the path meet. Its rocks preserve traces of ancient life; its unstable slopes and altered shorelines show that the coast is still changing.

Extent and geological record

The route described in the book reaches the Jurassic Coast at Old Harry Rocks, where white arches and stacks draw crowds of photographers to the cliff edge. From there the World Heritage Site runs for ninety-five miles along the south coast to Orcombe Point near Exmouth. The route’s white chalk band, seen as the walkers face west, is only one expression of a coastline built from layers of different ages and materials.

The exposed rocks span the Triassic, Jurassic and Cretaceous periods. Their stone and mud hold fossil remains of plants and animals, from tree ferns and insects to molluscs and mammals; some fossils preserve the remains of an animal’s last meal. The narrator treats these formations as a record of life caught in motion and held in stone. Each layer makes the coast more than a scenic route: it is an archive in which immense stretches of time become visible underfoot.

Walking the eastern cliffs

Beyond the stifling dunes at Old Harry Rocks, the walkers find trodden sea grasses and heather. After months of inland confinement, the open horizon brings Ray an intense sense of relief. The path passes through trees and short grass before opening onto the chalk stacks, where swallows hunt insects over yellow-flowered gorse. Turning away from the photographers, Ray and Moth follow the wind west along the coast.

They camp on Ballard Down, watching the lights of Swanage glitter across the bay. The view offers a pause, but the coast remains physically demanding. Near Worbarrow Tout, they pass Tyneham, requisitioned by the army in 1943. The villagers were displaced, and military use made their land and memories part of the training ground. Yet restricted public access, limited intensive farming and occasional small-arms fire also allowed wildlife and vegetation to thrive. The resulting landscape is an unintended form of conservation, inseparable from the community’s loss of home.

Beyond Tyneham, the cliffs around Worbarrow and Mupe Bay shine white above turquoise water. The steep ascent of Flower’s Barrow tests the walkers in dry, slippery grass; from the top, views open across Dorset and west along the chalk cliffs towards Lulworth. Their route down is no gentler: missing an easier descent, they take the steep path towards Mupe Bay. At the bottom, they stop to examine fossilized conifer remains in the rocks, growths about four feet wide that formed in their original soil around 135 million years ago. The fossils bring deep time into an exhausting, immediate walk.

Landslip and the Undercliff

Near Lyme Regis, the walkers acknowledge Moth’s approaching death and imagine their remains scattered together along the coast. The conversation places intimate grief beside the geological record, before the path leaves the open shore and enters the Undercliff. This damp, densely vegetated landscape was formed on Christmas Eve 1839, when eight million tonnes of soil slipped towards the sea and left a great chasm.

The landslip carried away sheep, rabbits, a tea room and a place known as goat island. A wheat field slid intact and was harvested the following summer. In the years after the collapse, the abandoned ground developed into a seven-mile stretch of ferns, ivy and trees. The path winds through it for eight miles before the walkers emerge into the light. Its tangled growth gives the Undercliff a markedly different character from the exposed cliffs: the place has been changed by catastrophe, then reshaped by vegetation largely left to grow on its own terms. The path is the only way in or out, making passage through the landscape feel as narrow and contingent as the event that created it.

Erosion, wreckage and the changing coast

At Branscombe, the walkers stop to prepare food on the shingle. The shore also bears the history of the 2007 grounding of the container ship MSC Napoli. Although Falmouth Harbour was much closer, the authorities chose to take the ship to Portland; it ran into difficulty and ended up about a mile off Branscombe. Its cargo washed ashore, including perfume, wine and BMW motorbikes. Authorities struggled to prevent scavenging, and some of those who took goods were later described as having helped with the clean-up. Seven years afterwards, Ray and Moth see no trace of the wreck on the beach, though a shiny motorcycle remains in a shed behind the café. The episode joins a local beach to the wider consequences of decisions about shipping, salvage and the protection of wildlife: the area is important for wintering seabirds and endangered seabed life.

The coast’s instability is also immediate rather than merely historical. After leaving Budleigh Salterton in fading light, Ray and Moth struggle to find a place to camp between high hedges and a wire fence. The next morning, they discover that a substantial earth slip has occurred only a few hundred metres away, leaving red earth and stones churned at the base of the cliff. The ground between the golf course and Straight Point appears similarly vulnerable. Erosion here is not just a feature to admire from a path; it threatens the land and built attractions that people have placed beside it.

The western edge and narrative significance

As the walkers pass through the rows of caravans and chalets at Exmouth, the Jurassic Coast falls behind them. They buy food and take a ferry across the River Exe to Starcross, after which the route follows roads, railway lines and patches of scrub and concrete before reaching Dawlish Warren. The change from cliffs and open coastline to built-up stretches alters the practical conditions of walking: camping becomes difficult, and the pair consider spending their last money on a train and bus to avoid further nights without a secure place to stay.

Across the walk, the Jurassic Coast is neither an untouched backdrop nor a stable boundary between land and sea. Fossils, landslips, military history, shipping, tourism and the walkers’ own search for shelter occupy the same landscape. Its significance lies partly in that accumulation: the rocks preserve vanished worlds, while the living coast continues to erode, absorb human interventions and make each passage along it provisional.