Crymlyn Bog and Pant-y-Sais Fen National Nature Reserve (Swansea)

These sites are next to each other and both form the National Nature Reserve. The reserves are also a Ramsar site, SAC and SSSI. The sites are home to a host of plants and animals including many dragonflies and damselflies. High-lights are hairy dragonfly, variable damselfly, scarce blue-tailed damselfly, ruddy darter, keeled skimmer, black darter they are also home to the fen raft spider. Crymlyn Bog is the most extensive lowland fen in Wales. Both sites have boardwalks and their own car parks.

To get to the Pant-y-Sais carpark, get off the M4 at junction 43, or the A438 (Fabian Way) Swansea – Port Talbot. At the first round about, take the B4290 (Swansea – Llandarcy) towards Jersey Marine. The Pant-y-Sais car park is just past Jersey Marine. There is a circular boardwalk from the car park (and also accessible from the canal towpath) which takes you into the middle of the fen.

To get to the Crymlyn Bog car park and visitor centre (open via prior arrangement), get off the M4 at junction 43, follow the A438 (Fabian Way) towards the centre of Swansea, after the Tir Jon Waste Tip (on the right) filter right and turn right onto Wern Terrace. At the top of Wern Terrace turn right on to Dinam Road, go past the tip entrance and continue along the narrow road for 2/3 mile and the entrance to Crymlyn Bog is on the right. There is a 800m long circular route leading from the car park, some of this route has a boardwalk onto the bog itself.

The reserve is open all year.

Contact Us

Grid reference (Pant-y-Sais): SS 712 946.
Nearest postcode: SA10 6JS.

Grid reference (Crymlyn Bog): SS 696 945.
Nearest postcode: SA1 7BN.

Crymlyn Bog and Pant-y-Sais Fen National Nature Reserve (Swansea)