Craig y Rhiwarth

Reserve Information


Park at Craig y Nos Country Park, just off the A4067 (there is a small parking charge though toilets and refreshments are available here). A path then takes you through the park and over the river Tawe to a bridleway. The reserve is then in front of you to your right. Alternative access is possible via our Allt Rhongyr nature reserve.

Nearest town: Glyntawe. Post code SA9 1GP.

SN 846 159


Find out here

Public Transport

Find out here

Opening Times



4.5 hectares

Walking Information

The reserve is open to visitors and you are allowed to visit the reserve on foot for your quiet enjoyment of the wildlife present. However, the site features many areas of scree, steep slopes and cliffs making access very difficult and which should be avoided for your safety. The site can be very wet at any time of year.


The paths via Craig y Nos Country Park to the entrance of the reserve are wheelchair accessible.

Geology Trail


Park at Craig y Nos Country Park.


Dogs must be kept on a lead at all times.

Grazing Animals


Factsheets and Guides for Your Visit

View from Craig y Rhiwarth

This reserve contains some of the finest examples of limestone plant communities in Brecknock. The reserve contains more than 400 species of trees, flowers, moss and lichens.

Craig y Rhiwarth seen from south

Mossy saxifrage thrives on the limestone rocks

What to look out for

The ash woodland has a ground flora that includes lily of the valley, wood spurge, wood fescue and various mosses.

Grassland areas of the reserve have typical limestone grassland flora such as wild thyme and salad burnet and the rarer soft-leaved sedge and mossy saxifrage.

Please Note:
The northern part of Craig y Rhiwarth Site of Special Scientific Interest is no longer part of the nature reserve. It is private land and access is restricted to existing public rights of way only.

Ravens nest on the rocky cliffs

Species and habitats

Upland Calcareous Grassland, Upland Mixed Ashwood
Ash, Bird's-foot-trefoil, Bramble, Broad-leaved Helleborine, Bulbous Buttercup, Centaury, Cock's foot, Common Frog, Crested Dog's tail, Daisy, Dandelion, Eyebright, Field Wood-rush, Harebell, Hawthorn, Knapweed, Lily of the Valley, Mouse-ear-hawkweed, Quaking-grass, Raven, Red Clover, Ribwort Plantain, Salad Burnet, Selfheal, Sweet Vernal-grass, White Clover, Wild Thyme, Wood Spurge

Nature Reserve Map