Nature Reserves in Carmarthenshire
Nature Reserves in Carmarthenshire
Nature Reserve Guide
Carmarthenshire is home to 5 National Nature Reserves, each designated for its significant ecological value. These protected areas showcase the county's diverse geography, spanning from ancient woodlands and upland moors to wetland mires and unique karst landscapes. The reserves offer a variety of environments, including the parkland at Dinefwr, the raised bog at Cors Goch, and the sessile oak woods of Allt Rhyd Y Groes. These landscapes provide settings for outdoor activities such as hiking, jogging, mountain biking, and road…
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Last updated: April 23, 2026

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Carmel National Nature Reserve in South Wales offers varied terrain, from gentle paths to rocky tracks, for hiking, cycling, and jogging through unique karst landscapes and diverse habitats.
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Waun Las National Nature Reserve in Carmarthenshire, Wales, offers diverse landscapes for hiking, featuring woodlands, meadows, and restored lakes. It is known for its rich biodiversity.
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Allt Rhyd Y Groes National Nature Reserve features ancient woodlands, gorges, and heathland, offering routes for hiking, mountain biking, and road cycling.
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Dinefwr Estate National Nature Reserve is Wales' only parkland NNR, offering diverse routes for hiking, cycling, and jogging across 800 acres of hills and woodlands.
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Cors Goch, Llanllwch National Nature Reserve is a lowland raised mire offering diverse terrain for hiking, jogging, and cycling routes through wetlands, woodlands, and parkland.
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Carmarthenshire's nature reserves are protected areas designated for their ecological value, encompassing diverse landscapes from ancient woodlands to wetlands. This page features 5 National Nature Reserves, including Dinefwr Estate National Nature Reserve and Carmel National Nature Reserve. These reserves offer hundreds of routes for activities like hiking and cycling.
The main National Nature Reserves featured for Carmarthenshire include Carmel National Nature Reserve, known for its unique karst landscape, and Dinefwr Estate National Nature Reserve, which is Wales's only parkland NNR. Other notable reserves are Waun Las National Nature Reserve within the National Botanic Garden of Wales, and the sessile oak woods of Allt Rhyd Y Groes National Nature Reserve.
The primary activities are human-powered outdoor sports. This page details more than 300 routes across the reserves, with hiking, cycling, and mountain biking being the most common. There are also numerous trails suitable for jogging and running.
Dinefwr Estate, Wales's only parkland National Nature Reserve, offers over 70 routes across its 800 acres. The trails are suitable for hiking, jogging, and cycling, traversing historic parkland, hills, and woodlands. The landscape was designed by Lancelot 'Capability' Brown and features ancient trees and a medieval deer park.
Carmel National Nature Reserve is known for its distinctive karst landscape, a result of limestone geology. The reserve features a turlough, or seasonal lake, which is unique in Britain. It offers more than 70 routes for hiking, cycling, and jogging through varied terrain that includes woodlands and open grasslands.
Yes, Waun Las National Nature Reserve is accessible to visitors, though it is located within the National Botanic Garden of Wales and requires entry to the garden. The reserve is managed as an organic farm and features a network of paths through wildflower meadows, pastures, and woodlands. It is of international importance for its variety of waxcap fungi.
Yes, several reserves are suitable for families. Dinefwr Park National Nature Reserve offers wide paths through parkland, and Pembrey Burrows and Saltings Local Nature Reserve has level walking and cycling routes along the Millennium Coastal Path. Waun Las National Nature Reserve, within the National Botanic Garden, also provides accessible paths for exploring.
Dog policies vary by reserve to protect wildlife and livestock. At Dinefwr Park, dogs are welcome on short leads in the parkland but not in the areas with cattle. At Waun Las, dogs are not permitted within the main reserve to protect the organic farm status. It is essential to check the specific rules for each reserve before visiting.
There are dozens of hiking trails across the reserves, ranging from gentle walks to more strenuous routes. Dinefwr Estate National Nature Reserve has parkland trails, while RSPB Gwenffrwd-Dinas offers a rugged 2.5-mile (4 km) circular trail through woodland valleys. Carmel National Nature Reserve provides routes through its unique karst landscape.
Yes, cycling is a popular activity in several reserves. The page features numerous routes for road cycling and touring bicycles. For example, Cors Goch, Llanllwch National Nature Reserve has over 20 touring bicycle routes in its vicinity, and Dinefwr Estate offers cycling paths through its historic parkland.
Birdwatching opportunities exist year-round, with different species present depending on the season. In spring and summer, reserves like RSPB Gwenffrwd-Dinas are good for spotting pied flycatchers. In autumn and winter, wetland reserves such as Ashpits Pond and the WWT Llanelli Wetland Centre attract migrating waders and wildfowl.

