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Poldice Mine Loop Stone Marker – Wheal Maid Valley Tailings Dam loop from Chacewater

Routes

Mountain biking trails

Poldice Mine Loop Stone Marker – Wheal Maid Valley Tailings Dam loop from Chacewater

Easy

4.0

(2)

riders

Poldice Mine Loop Stone Marker – Wheal Maid Valley Tailings Dam loop from Chacewater

01:19

15.4km

260m

Mountain biking

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels. The starting point of the route is right next to a parking lot.

Last updated: May 16, 2026

Tips

Includes a segment in which cycling is not permitted

After 5.81 km for 314 m

Waypoints

Start point

Parking

Get Directions

1.54 km

Chacewood Bike Park

Highlight • MTB Park

Small downhill bike park just outside of Chacewater, Truro.
Parking at Chacewater or Twelveheads and ride in.
Must pre book, max 15 riders. Saturday and Sunday, morning and afternoon slots.

Good selection of short punchy and flowy red trails and one black jump line.
I'd describe it as The Track for trail. Session the lines over and over to improve skills and transfer to other trails.
facebook.com/chacewoodbikepark

Tip by

2.77 km

Twelveheads Cafe

Highlight • Cafe

Lovely food, great service. We came across this cafe just at the right time in our ride!

Tip by

5.17 km

Poldice Mine Ruins

Highlight • Historical Site

5.18 km

Arsenic Calciner Ruins

Highlight • Historical Site

Built in 1897, this calciner was used to roast arsenic ore - check out the date above the archway. Arsenic gas was driven off by the heat and travelled towards the stack higher up the hill and through the labyrinth, or lambreth, where it condensed on the walls.

See this link for a diagram of the Brunton roasting furnace with the revolving hearth
upload.wikimedia.org/wikipedia/commons/a/af/Brunton_roasting_furnace.png

Tip by

5.28 km

Poldice Mine Loop Stone Marker

Highlight • Trail

5.39 km

Lambreth Arsenic Flue Ruins

Highlight • Historical Site

In tin production, ore was roasted above 300°C to remove impurities such as sulphur and arsenic which otherwise made the cast tin brittle. If arsenic was desired, fumes from the calciner passed through a long flue known as a 'lambreth' or labyrinth, where the gas cooled and condensed, forming arsenic crystals on the walls. When sufficient had collected, the calciners were stopped, iron doors in the lambreth were opened, and the arsenic ‘soot’ was swept off the walls and shovelled out. Workers put wads of cotton wool in their nostrils and a cloth over their mouths. and followed strict washing regulations, but still experienced skin irritations. Some workers were believed to have developed partial immunity, and folklore suggested arsenic improved complexion and hair condition.
The lambreth had a tall stack at the end to create a strong through draught and also to reduce the damage caused by the noxious fumes.

Tip by

8.24 km

Wheal Maid Valley Tailings Dam

Highlight • Trail

One of the best places in Cornwall to get some air on your Mtb. Huge range of trails for all tastes and abilities. It's common land so open to all Inc walkers and horses, be respectful and leave nothing but tread marks.

Tip by

9.75 km

Poldice Valley Mountain Bike Trails

Highlight • Structure

Fun trails with some interesting features. Hard packed ground means they are good for riding all year round.

Tip by

15.4 km

End point

Parking

Way Types & Surfaces

Way Types

8.37 km

3.51 km

3.07 km

298 m

114 m

< 100 m

Surfaces

8.62 km

3.32 km

2.82 km

480 m

165 m

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (110 m)

Lowest point (30 m)

Weather

Monday 18 May

14°C

12°C

56 %

Additional weather tips

Max wind speed: 32.0 km/h

to get more detailed weather forecasts along your route

Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.

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Poldice Mine Loop Stone Marker – Wheal Maid Valley Tailings Dam loop from Chacewater

Chacewood Bike Park

Twelveheads Cafe

Poldice Mine Ruins

Arsenic Calciner Ruins

Poldice Mine Loop Stone Marker

Lambreth Arsenic Flue Ruins

Wheal Maid Valley Tailings Dam

Poldice Valley Mountain Bike Trails

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