The lake at Swanpool was once part of the sea but after the last Ice Age, a shingle bar formed (similar to the Loe Bar near Helston) which cut off the lake from the sea and it became a freshwater lake, roughly three times the size of the current lake. In the mid 1820s, a culvert was dug to drain much of the lake into the sea, creating the lake you see today. On high Spring tides, the seawater flows back through the culvert into the lake so the water is brackish (slightly salty).

The brackish lagoon forms an unusual habitat that supports some rare wildlife. This includes the Trebling Sea Mat which is found nowhere else in the UK. The wooded wetland behind the lake is criss-crossed by six small streams and it provides a valuable habitat for birds and small mammals. The whole area is now a designated nature reserve.

More about Swanpool

On walks

Get the iWalkCornwall app

Phone showing walk for purchase
Download the app and use it to explore the walks and to purchase a guided route.
Phone showing Google navigation to start of walk
The app will direct you to the start of the walk via satnav.
Hand holding a phone showing the iWalk Cornwall app
The app guides you around the walk using GPS, removing any worries about getting lost.
Phone showing walk directions page in the iWalk Cornwall app
The walk route is described with detailed, regularly-updated, hand-written directions.
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Each time there is a new direction to follow, the app will beep to remind you, and will warn you if you go off-route.
Phone showing walk map page in the iWalk Cornwall app
A map shows the route, where you are at all times and even which way you are facing.
Phone showing facts section in iWalk Cornwall app
Each walk is packed with information about the history and nature along the route, from over a decade of research than spans more than 3,000 topics.
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Once a walk is downloaded, the app doesn't need a phone or wifi signal during the walk.
Phone showing walk stats in the iWalk Cornwall app
The app counts down distance to the next direction and estimates time remaining based on your personal walking speed.
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We keep the directions continually updated for changes to the paths/landmarks - the price for a walk includes ongoing free updates.