Green Corridor to the China Clay Country Park

A Car Free Day Out around St Austell CL01

Railway Station in St Austell with footpath signs to Centre and Clay Trails

Railway Station in St Austell with footpath signs to Centre and Clay Trails

This is a pleasant walk of about 2 miles along the Green Corridor linking St Austell town centre with Wheal Martyn Museum and China Clay Country Park. Refreshments and meals are available at the Museum.




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Starting from the main rail/bus station, walk weswards towards the footbridge over the railway do not cross) and then down the hill to the Church. Further information about historical features of the town will be found on the Discovery map. From Holy Trinity Church in the centre of St Austell proceed up North Street, past the Queens Head and the Old Manor House and on up the hill until you cross over the railway bridge. Immediately after crossing the railway turn left into Tremena Road.

On the north side of the road are some grand granite built houses, built about 100 years ago for the clay barons of the china clay industry. After a few hundred metres the turning onto the trail leading to Wheal Martyn will be seen on the left. This takes you alongside the railway for a short distance, with the massive railway viaduct in front. The trail then drops down onto the bed of the old branch line which leads in a northerly direction up the valley of the Vinnick (White River).

Continue along the side of this ‘Green Corridor’, passing the remains of a large china clay drying kiln on the right. In the wood on the opposite side of the valley was Trethowel china clay works, now so obscured by trees that it is impossible to see anything of the gash in the hillside made by the china clay mining operation. China Clay is a white clay used in paper, ceramics, paint and many other uses. Producing china clay has been the main activity in St Austell for the past 200 years and china clay is still Britain’s second most valuable mineral export, after petroleum.

Clay trails with traditional Clay tip in distance, near St Austell

Clay trails with traditional Clay tip in distance, near St Austell

Follow the path for 2km where the main path veers to the right and continues steeply up the hill twards Carludden and Eden. Do not take this path, but descend on a path on the left which leads to a footbridge constructed over the main road to a trail on the other side, again on the bed of the old branch line. Pass by several more drying kilns until the Museum is reached.

The Museum is centred around the refining and drying operations of an early china clay producing complex. There is also a purpose-built Museum with a fascinating series of displays, some interactive, describing the history of china clay mining and the Cornish culture associated with those who worked in the industry (an admission fee is payable). Outdoor displays feature large waterwheels driving pumps and the refining and drying of china clay, plus many other artefacts large and small (including a locomotive and rolling stock) used in the industry.

The visitor should then proceed up the hill, through a short tunnel to the viewing platform where it is possible to see two active china clay producing pits – Wheal Martyn and Greensplat. China Clay is obtained from granite which has been altered (kaolinised) to a soft matrix which can easily be broken down in water into a slurry composed of coarse quartz sand, fine micaceous residue and kaolinite – the mineral forming china clay.

The coarse sand is removed in the pit and is disposed of in the large tips dotted around the skyline. Many of these sand tips have been landscaped so that they are almost indistinguishable from natural hills. An increasing amount of waste sand is used in construction. Further refining separates the micaceous residue from the china clay, which is then conveyed in pipelines to drying units.

Wheal Martyn Museum, near St Austell

Wheal Martyn Museum, near St Austell

Descend from the viewing plaform; at a bifurcation take the path on the left (do not go down the way you came up) and walk on a level path through some trees. This is an old tip from an early phase of Wheal Martyn. Then descend through the woods to the Boulder Park and the SSSI where many of the rock types seen in the china clay tips are displayed.

The path then leads down into the old china clay works seen earlier. After all that exertion a nice cup of tea awaits in the Museum restaurant, which also sells a wide range of other drinks and hot meals. There is also a shop selling a good range of quality goods, including ceramics, souvenirs and books.

Return the same way as you came or, if you are feeling energetic, take the steeply rising path mentioned earlier to Carluddon and then walk down the hill to St Austell or catch a Western Greyhound Bus 529 at Tregonissey into the town.