Cae Lynden

Reserve Information


The reserve is in the Gurnos housing estate off the A4067 Ystradgynlais bypass. From Gorof Road, turn left along Gyrnosfa. At the roundabout, turn uphill into Heol Meurig, the next right into Hoel Gren and immediately right again into Lynden road. The site entrance is off the footpath running behind the childrens play area.

Nearest town Ystradgynlais. Post code SA9 1DW.

SN 776 101


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Public Transport

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Opening Times



2.4 hectares

Walking Information

An open access reserve, you are allowed to visit the reserve on foot for your quiet enjoyment of the wildlife present. There are no site paths and the site can be wet in places at any time of year.


Unsuitable for wheelchairs.

Geology Trail


Park at the roadside but please do not block roads or property entrances.


Please keep dogs on a lead to prevent disturbing ground nesting birds.

Grazing Animals

There may be livestock on site, please do not approach them or feed them. Additionally there may be electric fencing to keep them off parts of the site, please cross this with care.

Factsheets and Guides for Your Visit

Cae Lynden rhos pasture

Cwm Wanderers once played football on this site. It is now a nature reserve of wet tussocky grassland known as Rhos pasture. It is home to the rare marsh fritillary butterfly.

Cae Lynden nature reserve

Heath spotted orchids grow in the rhos pasture

What to look out for

In spring look for the bright yellow flash of the brimstone butterfly and in summer the grassland is full of ringlet, meadow brown and gatekeeper butterflies. The marsh fritillary flies in June laying eggs on devil’s bit scabious leaves. In August & September its caterpillars feed on devil’s bit scabious within their larval webs amongst mollinia tussocks. Late summer wildflower displays of purple flowering devil’s bit scabious and red ragged robin. Woodland birds in the oak woodland and snipe and woodcock in winter.

Marsh fritillary butterflies breed here, this is a larval web made by the caterpillars

Species and habitats

Lowland Mixed Deciduous Woodland, Rhos Pasture
Alder, Ash, Beech, Bramble, Brimstone, Creeping Buttercup, Dandelion, Devil's-bit Scabious, Dog violet, Enchanter's nightshade, English / Pedunculate Oak, Gatekeeper, Gorse, Hart's-Tongue, Hawthorn, Heather, Hedgehog, Herb Robert, Holly, Ivy, Lady-fern, Meadow Brown, Osier, Ragged-Robin, Sessile Oak, Snipe, Soft-rush, Stinging Nettle, Sycamore, Tormentil, Wood Avens, Woodcock

Nature Reserve Map