How to Find Hidden Beaches in Cornwall Using Ordnance Survey Maps

Cornwall's famous beaches arrive with a car park, a queue for the ice cream hatch and a lifeguard hut flying a flag. The coves you remember for years usually do not. They sit at the bottom of a footpath that begins at a gate on a single-track lane and takes twenty minutes to walk — roughly the time it takes to thin a crowd down to almost nobody.

Finding them is not luck. It is map reading, a tide table and a willingness to look at a piece of coastline properly before deciding where to go.

Buy the map before you choose the beach

Start with the OS Explorer series at 1:25,000 rather than the Landranger at 1:50,000. At Explorer scale, a single field boundary, a stile, a footpath junction and a five-metre contour all appear on the sheet, and that detail is exactly what separates a pleasant descent from a nasty one.

Cornwall's coast is covered by a manageable handful of sheets. Explorer 102 covers Land's End and the Penwith peninsula, 103 takes in the Lizard, 104 runs from Redruth to St Agnes, 105 covers Falmouth and Mevagissey, 106 Newquay and Padstow, 107 St Austell and Liskeard, and 111 Bude, Boscastle and Tintagel. Two or three sheets will cover most holidays.

Buy paper, or the laminated Active version if it will live in a rucksack. Map apps are useful for a quick look, but a phone screen zooms in on the land without showing you the legend or the shape of the surrounding coast, which is the whole point. If you prefer to print, order a 1:25,000 extract of the exact square you need and take it in a clear plastic wallet.

Learn the symbols that point to a quiet cove

Once you have the map open, you are looking for a very specific combination of features. Anything with a road running to it, a car park symbol, a public convenience or a cluster of buildings will be busy in summer. Anything without those things, but with sand and a path, is a candidate.

• Yellow patches are sand. Small ones tucked between two headlands are the ones worth investigating.
• No road within half a kilometre. If the nearest lane ends at a farm gate, expect a walk.
• A footpath, not a road. Green dashed lines show public footpaths; a path with several contour bands between the lane and the shore means an honest descent, which keeps casual visitors away.
• Access land. Explorer maps tint open access land in a pale orange wash, and much of the coastal margin along the South West Coast Path falls into this category.
• The gap between the two water lines. Maps mark both mean high and mean low water. Where the gap is wide, a great deal of sand appears at low tide — and disappears again remarkably quickly.

Keep the legend open beside you for the first few trips. Symbols for cliffs, rocks, steep ground and landing stages are easy to misread until you have seen them on ground you already know.

Read the cliff, the paths and the access notes

Contours at 1:25,000 are drawn at five or ten metre intervals. Lines packed tightly together, running straight into the sea, mean a cliff, not a beach path. A cove where the contours open out, and where a footpath zig-zags down, is a cove you can reach without a scramble.

Follow the path properly on paper before you follow it on foot. Public footpaths appear as green dashes, bridleways as longer dashes with waymark arrows, and other routes with public access in orange. Those orange routes are often permissive rather than guaranteed, and can be closed or withdrawn, so treat them as a bonus rather than a plan.

Two checks are worth doing before you set off. First, look for temporary path closures — Cornwall Council publishes these, and a notice pinned to a stile is there for a reason, whether that is erosion, a fallen tree or a landslip. Second, remember that a path down to a cove does not automatically mean the cove itself is open to everyone. In England the foreshore below the mean high water mark is generally open to the public, but the path may cross private land, and some coves carry specific restrictions. Read the signs where you park, and turn back if a route is clearly closed.

Let the tide table choose your hour

Sand and safety both depend on the tide, so pick the hour before you pick the cove. The Admiralty's tide service gives free predictions for standard ports such as Newlyn, Falmouth and Padstow, with corrections for nearby secondary ports. Harbour noticeboards often carry the same information for the week ahead.

Two things catch people out. The first is springs and neaps: across a fortnight the range in Cornwall shifts enough that a cove which is all sand at low water springs can still be half full at low water neaps. The second is how quickly the water returns. The rule of twelfths is a decent rough guide — in the first hour after low water the sea rises about one twelfth of the total range, then two twelfths, then three, before slowing again on the flood. The middle hours move fastest.

Some coves have no exit at high water bar a steep climb. Never let the sea get between you and your route out, and treat a rising swell as a reason to leave early rather than a reason to stay and watch it. If the sea is running big, the beach will be there another day.

A method you can repeat, start to finish

1. Choose a stretch of coast with two or three possible coves on the same sheet, so a change of plan costs you nothing.
2. Scan the 1:25,000 for small yellow sand patches with no road and no car park symbol.
3. Trace

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