Crymlyn Bog And Pant Y Sais National Nature Reserve
Crymlyn Bog And Pant Y Sais National Nature Reserve
4.4
(41)
13,185
runners
375
runs
Jogging around Crymlyn Bog And Pant Y Sais National Nature Reserve offers a unique experience through diverse wetland landscapes. The region is characterized by lowland fen, extensive reedbeds, and accessible paths, including boardwalks. Joggers can also utilize canal towpaths and lakeside trails, providing generally flat and varied terrain suitable for running. This environment, formed in a glacial depression, supports a rich array of flora and fauna, making for an engaging outdoor activity.
Last updated: May 9, 2026
85
runners
24.6km
02:32
70m
70m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
4
runners
5.19km
00:33
80m
80m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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15
runners
11.7km
01:13
70m
70m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
runners
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
5
runners
14.2km
01:29
100m
100m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Popular around Crymlyn Bog And Pant Y Sais National Nature Reserve
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The Marina is a great place to run. It is really flat and you can run past all the boats along the paths. The beach is close by and there are cafes and pubs that you can start or finish it. There's also public toilets there and there is a nice 5k loop or more
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A lovely long stretch of beach across from the Clyne cycle path. You can run all the way along the promenade down to Swansea city or along to Mumbles. There are is a cafe further along and public toilets.
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Great place to go running. You can run along the beach or there is a path that runs parallel to the beach which is flat and wide enough for runners.
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This is a great section of NCN 4 which crosses over the River Neath parallel to the elevated M4 motorway. It's quite an industrial stretch but the views are great, and the cycle path is segregated from the road.
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Enjoy unobstructed views across Swansea Beach on this long flat section of paved path that follows the coastline. On a clear day you should be able to see all the way over to Mumbles Head, which marks the start of the Gower Peninsula.
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Swansea Marina, is the place "where the city meets the sea", located behind the Swansea barrage at the mouth of the River Tawe.
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A fantastic piece of cycle path for the more adventurous type. Had to bash my way through a couple of spots with encroaching reeds... great fun!
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There are over 380 running routes in the Crymlyn Bog And Pant Y Sais National Nature Reserve area, catering to various fitness levels. These include 33 easy routes, 255 moderate routes, and 98 difficult routes, ensuring options for everyone from casual joggers to experienced runners.
Yes, the reserve offers several easy, generally flat paths perfect for beginners or a relaxed jog. The Running loop from Coedffranc is a moderate 3.2-mile (5.2 km) option that provides an accessible introduction to the natural surroundings. Additionally, within the reserve itself, shorter trails like the Bog Walk (0.7 miles) and the Pant y Sais Walk (0.4 miles) offer very accessible, level terrain, often on boardwalks.
Crymlyn Bog is Wales' largest lowland fen, offering a unique wetland ecosystem with swamps, tall reedbeds, and fen meadows. Joggers can enjoy diverse flora like yellow iris and royal fern. The extensive reedbeds are a haven for numerous bird species, including reed warblers and Cetti's warblers, and you might even spot rarer visitors like marsh harriers. The bog is also rich in insects, notably dragonflies and damselflies, and is home to the fen raft spider.
Yes, many of the running paths in the area are circular, allowing you to start and finish at the same point. For example, the Red Jacket Pill loop from Coedffranc is a 7.3-mile (11.8 km) circular trail through wetland areas. The Fendrod Lake loop (2.4 miles) and the accessible Pant y Sais Walk (0.4 miles) are also excellent circular options.
While specific parking details for each trailhead vary, the reserve is located near Swansea, making it relatively accessible. Many routes, like those starting from Coedffranc, likely have nearby parking facilities. For public transport, local bus services connect to areas surrounding the reserve. It's advisable to check local transport schedules for the most convenient access points.
Absolutely. The reserve features accessible paths and boardwalks that are largely flat, making them suitable for a wide range of abilities, including families with children. Shorter, easy trails like the Bog Walk and the Pant y Sais Walk are particularly good for a family outing, offering a chance to enjoy nature without strenuous effort.
Many trails within the reserve and surrounding areas are dog-friendly, but it's crucial to keep dogs on a lead to protect the sensitive wetland ecosystem and its wildlife. The reserve is a haven for ground-nesting birds and other animals, so responsible pet ownership is essential to preserve this natural habitat.
The area is highly rated by the komoot community, with an average score of 4.4 stars from over 40 reviews. Runners often praise the unique wetland landscapes, the tranquility of the environment despite its proximity to urban areas, and the network of accessible, generally flat paths and boardwalks that make for an enjoyable and immersive running experience.
Yes, for those seeking a greater challenge, the reserve offers longer routes. The Tennant Canal Towpath – Swansea Bay loop from Coedffranc is a difficult 16.0-mile (25.8 km) trail that follows the level Tennant Canal towpath and provides views towards Swansea Bay. Another option is the Red Jacket Pill – Ashlands Woods loop from Coedffranc, a moderate 14.1-mile (14.2 km) route.
The reserve offers a rewarding experience year-round. Spring and summer bring vibrant flora and increased bird activity, making for excellent wildlife spotting. Autumn showcases beautiful wetland colors. Even in winter, the accessible paths and boardwalks allow for enjoyable runs, though conditions might be wetter. Always check local weather forecasts before heading out.
While the reserve itself is a natural area, its proximity to Swansea means there are various amenities nearby. You can find cafes, pubs, and other facilities in the surrounding towns and villages, perfect for a refreshment or meal after your run. Specific options would depend on your starting point and chosen route.
The terrain is predominantly flat, characterized by a mix of level paths, grassy tracks, and extensive boardwalks, especially within the fen areas. You'll also find canal towpaths and lakeside trails, providing a varied but generally easy-to-navigate surface suitable for running. This ensures accessibility even in the wetland environment.


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