Meadow, woodland and pasture in the Lincolnshire Wolds

Sow Dale is the most extensive of the dales that fret the Spilsby Sandstone country of the southern Wolds. For centuries it has formed an important access to the hills from the fenland country to the south; the famous prehistoric site of Hall Hill overlooks the entrance to it, and by the Middle Ages it was guarded by John of Gaunt's great castle at Old Bolingbroke. Until the early 1980s the Dale had survived in traditional usage of meadow, pasture and woodland, but recently more intensive farming has converted large areas of it to arable cropping, with consequent loss of landscape and wildlife interest.

The Trust's reserve consists of a meadow and woodland in the upper part of the Dale and a block of some 23.5 hectares (58 acres) of pasture in lower Sow Dale immediately adjacent to Old Bolingbroke. There are some fine old hedges, and willow and alder carr alongside the stream. Common spotted-orchid, ragged-robin and fleabane are among the flowers of the grassland; kingcups make a bold splash of colour in April in the spring-line flushes on the valley sides where the sandstone meets the Kimmeridge Clay below it. In the carr the stands of giant horsetail resemble a coal measure forest and the branching marsh thistles grow to 6 feet or more. Both species of golden-saxifrage (alternate-leaved and opposite-leaved) grow in shady places by the stream, and in the open there are water forget-me-not and brooklime. Badgers are regular in the Dale and there is a varied bird fauna. Kestrel, sparrowhawk, barn and tawny owls, snipe, and green and great spotted woodpeckers are all resident. Garden, grasshopper and sedge warblers, blackcap, whitethroat and lesser whitethroat, and spotted flycatcher are summer visitors. The common grassland butterflies are usually abundant.


Nearest postcode: PE23 4HF (Lower Sow Dale)

Please note - postcodes are for the nearest registered address as we are unable to get postcodes for nature reserves. Please use the maps provided here to locate the entrance to the reserve.

Upper Sow Dale was designated a Sanctuary Area in 2014 with no public access. The area will be managed for conservation with reduced levels of disturbance for wildlife.


Species and habitats

Grassland, Meadow, Woodland

Nearby nature reserves

Keal Carr
2 miles - Lincolnshire Wildlife Trust
Snipe Dales
2 miles - Lincolnshire Wildlife Trust
Furze Hill
2 miles - Lincolnshire Wildlife Trust

Nature reserve map

Reserve information

Spilsby Road, Old Bolingbroke.
Map reference
TF 349666
Best time to visit
Apr - Jul
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Opening Times
Open at all times
34.00 hectares

Reserve is not easily accessible for wheelchair users as there are steep steps around the reserve.
Walking information
The track can become soft after rain and the climb back up the steps is fairly steep.
Roadside parking.
No dogs allowed
Grazing animals
Reserve manager
Lincolnshire Wildlife Trust
Tel: 01507 526667


Factsheets and guides for your visit