Reserve information

Turn off the B4599 onto Hendreladus, Ystradgynlais. Go through the kissing gate by Ystradgynlais youth and Community Centre and follow Sustrans route 43 for quarter of a mile. The reserve is in front and to your right. Alternatively access the southern side via Weavers Road, off Station Road, Ystradgynlais.
Nearest town Ystradgynlais. Post code SA9 1SE.
Map reference
SN 796 108

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  Public transport
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  Opening Times

40.9 hectares

The Sustrans route 43  cycle path provides wheelchair access through the site

  Walking information
The reserve is an open access reserve, you are allowed to visit the reserve on foot for your quiet enjoyment of the wildlife present. There are no formal paths and areas can be wet at all times of the year. A small river runs through the site.  Please visit the site with care.

Please park carefully in Weavers Road, Ystradgynlais, taking care not to block the road or property entrances.

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

  Grazing animals
There may be cattle or ponies 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.

  Reserve manager
Brecknock Wildlife Trust
Tel: (01874) 625708



Volunteers clearing scrub at Ystradfawr nature reserveVolunteers clearing scrub at Ystradfawr nature reserve

Ystradfawr Nature Reserve

Ystradfawr villas entranceField of devil's bit scabiousThis reserve, once the site of extensive coal mining, is a great example of how nature has reclaimed the landscape. It is a rich mix of wildlflower meadow, rhos pasture and young woodland. It is one of the best sites in Wales for the rare marsh fritillary butterfly.


What to look out for:

Look out for marsh fritillary butterfliesMarsh Fritillary larval webMarsh fritillary adults flying in June, the caterpillars feeding on devil's bit scabious in August and in mollinia tussocks in September within their larval webs. The spring and summer wildflower displays are stunning. The rhos pasture has purple flowering devil's bit scabious in summer. The species rich wildflower meadows have magnificent displays of ragged robin and angelica. Grass-snakes, slow-worms and common lizard can be seen basking in the sunshine. The wet woodland is inhabitated by many woodland birds. It is a good site to hear the well known call of the visiting cuckoo.

Nearby nature reserves

Wern Plemys
1.0 miles - Brecknock Wildlife Trust
Cae Lynden
1.7 miles - Brecknock Wildlife Trust
Craig y Rhiwarth
6.2 miles - Brecknock Wildlife Trust
Allt Rhongyr
6.4 miles - Brecknock Wildlife Trust

Nature reserve map