Crymlyn Bog And Pant Y Sais National Nature Reserve
Crymlyn Bog And Pant Y Sais National Nature Reserve
Crymlyn Bog And Pant Y Sais National Nature Reserve is a significant wetland area in South Wales, recognized as the largest lowland fen in the region. This national nature reserve features a diverse landscape of swamps, fen meadows, and extensive reed and sedge beds, shaped by glacial retreat approximately 12,000 years ago. Its unique ecosystem, including rare Transition Mire and Quaking Bog, provides a distinct setting for outdoor pursuits. The terrain is predominantly flat, offering accessible routes for several sports…
128
Routes
4.6
(146)
Average rating
6048
People visited

5.0
(2)
1,056
riders
90.6km
04:12
910m
910m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

5.0
(2)
149
riders
31.6km
01:45
280m
280m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.

5.0
(1)
93
riders
91.4km
04:14
990m
980m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.

5.0
(1)
23
riders
106km
04:55
1,210m
1,210m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
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5.0
(1)
21
riders
75.7km
05:50
960m
960m
Hard gravel ride. Very good fitness required. You may need to push your bike for some segments of this route.

5.0
(1)
20
riders
46.8km
03:44
920m
910m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

1
riders
18.3km
01:28
340m
340m
Moderate gravel ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

5.0
(1)
8
riders
38.1km
03:04
750m
740m
Hard gravel ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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4.3
(8)
82
riders
33.8km
02:10
340m
340m
Moderate bike ride. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.7
(7)
24
riders
70.9km
04:56
590m
590m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

2
riders
64.2km
05:23
960m
960m
Hard bike ride. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

4.8
(16)
364
riders
17.9km
01:07
50m
50m
Easy bike ride. Great for any fitness level. Mostly paved surfaces. Suitable for all skill levels.
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4.3
(4)
194
hikers
15.8km
04:03
60m
60m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

4.0
(2)
71
hikers
9.64km
02:27
30m
30m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

5.0
(1)
49
hikers
10.1km
02:35
40m
40m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

5.0
(2)
40
hikers
4.19km
01:04
20m
20m
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
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97
runners
25.8km
02:40
70m
70m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.

29
runners
11.6km
01:12
60m
60m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

40
runners
5.41km
00:34
40m
40m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

13
runners
6.53km
00:40
30m
30m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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5.0
(1)
69
riders
23.7km
02:18
700m
700m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

2
riders
55.6km
03:32
520m
520m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

4.0
(1)
13
riders
50.1km
02:47
340m
340m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.

5.0
(3)
12
riders
46.9km
03:18
180m
180m
Moderate mountain bike ride. Good fitness required. Suitable for all skill levels.
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Crymlyn Bog And Pant Y Sais National Nature Reserve is the largest lowland fen in Wales. It encompasses diverse wetland habitats, including swamps, fen meadows, and extensive reed beds, formed approximately 12,000 years ago. The reserve is recognized as one of Europe's most important wetland sites due to its unique ecosystem.
The reserve offers opportunities for hiking, jogging, road cycling, touring cycling, mountain biking, and gravel biking. There are 3 routes available, which have been rated an average of 4.51 out of 5 stars by more than 66,000 visitors. Explore options for hiking or cycling in the area.
Yes, the reserve features easy-grade walking trails, including boardwalks. The "Bog Walk" is 0.7 miles (1.2 kilometers) and the "Bog and Balloons Walk" is 1 mile (1.6 kilometers). Pant y Sais also has an accessible circular boardwalk trail of 0.4 miles (0.6 kilometers). Find more options in the easy hikes guide or family-friendly hikes guide.
While internal reserve trails are primarily for walking, the adjacent Tennant Canal towpath offers routes for touring or road cycling. This towpath runs alongside Pant y Sais and connects towards Swansea or Neath. Cyclists can find more information in the road cycling guide or general cycling guide.
The reserve is home to an exceptional array of wildlife and plant species. It supports rare plants like slender cotton-grass and royal fern, and its reedbeds provide habitat for numerous bird species, including reed warblers, sedge warblers, and water rails. It is also one of only three UK locations for the fen raft spider.
Information regarding specific dog policies within the reserve is best confirmed with Natural Resources Wales. However, komoot offers a guide for dog-friendly hikes around Crymlyn Bog And Pant Y Sais National Nature Reserve, which may include suitable routes.
The reserve's flat terrain and well-maintained paths are suitable for jogging. The "Bog Walk" (0.7 miles / 1.2 kilometers) and the "Bog and Balloons Walk" (1 mile / 1.6 kilometers) are easy-grade options. More jogging routes can be found in the running trails guide.
The reserve is popular among outdoor enthusiasts, with more than 66,000 visitors sharing their experiences on komoot. The available routes have an average rating of 4.51 out of 5 stars, based on 2,447 ratings.
Komoot provides several guides for the area, including Hiking, Road Cycling, general Cycling, and Running Trails. There are also guides for MTB Trails and various hiking categories like easy, family-friendly, and dog-friendly.
The official website for Crymlyn Bog National Nature Reserve is part of the Natural Resources Wales website: naturalresources.wales. For general inquiries, the phone number for Natural Resources Wales is 0300 065 3000.
The reserve is notable for being the largest lowland fen in Wales, featuring a mosaic of swamps, fen meadows, and extensive reed and sedge beds. Key ecological features include rare Transition Mire and Quaking Bog. It also hosts significant stands of royal fern.
Yes, the Wales Coast Path passes the edge of the reserve and can be joined underneath the canal bridge. The Tennant Canal towpath, which runs alongside Pant y Sais, also offers connections for longer touring routes.

