4.5
(2)
573
runners
59
runs
Jogging around Merthyr Tydfil offers diverse landscapes, from the southern edge of the Brecon Beacons National Park to the Taff Valley. The region is characterized by rolling hills, lush forests, and tranquil lakes, including several reservoirs like Pontsticill and Llwyn-On. Its industrial heritage is visible through historic elements such as viaducts and old tramroads, providing a unique backdrop to natural beauty. Cyfarthfa Park also offers expansive green spaces for urban running.
Last updated: April 23, 2026
36
runners
52.7km
06:20
1,270m
1,270m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
30
runners
12.2km
01:16
60m
60m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.

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28
runners
22.7km
02:32
370m
370m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
22
runners
17.8km
02:01
330m
330m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
21
runners
6.66km
00:41
30m
30m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
20
runners
24.6km
02:36
250m
250m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
18
runners
12.3km
01:18
160m
160m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
17
runners
7.10km
00:44
40m
40m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
18
runners
18.8km
02:04
230m
230m
Hard run. Very good fitness required. Mostly paved surfaces. Suitable for all skill levels.
17
runners
10.9km
01:10
170m
170m
Moderate run. Good fitness required. Mostly paved surfaces. Suitable for all skill levels.
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Pentwyn Reservoir is the smaller sister to Pontsticill Reservoir, both being separated by a causeway going towards the old Dolygaer outdoor centre. It is a very popular spot with fishermen and outdoor enthusiasts alike. The reservoir is used daily for a mix of watersports such as paddle boarding, kayaking, canoeing and raft building. It is in a beautiful setting, and you have great views north towards Pen y Fan and nice walks nearby.
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lovely . ( no phone signal ) bring yourself a drink and enjoy the view
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A remnant of Merthyr's past. This bridge carried a railway line that either took you through a tunnel to Aberdare or sent you north towards Cefn Coed and on to Brecon via Torpantau. Under the bridge was the Merthyr to Cardiff Glamorganshire canal which carried the produce of Cyfarthfa iron works to the ports of Cardiff which was then shipped all over the world.
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Lovely path to ride on. A gentle incline and suitable for most abilities
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Some great views of the valley below once you get on the viaduct
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Great, free car park. A small tearoom is located about 100 yards down the road
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Merthyr Tydfil offers a wide selection of running routes, with over 50 trails recorded on komoot. These range from easy paths to challenging mountain runs, catering to various fitness levels.
Merthyr Tydfil provides a distinctive running experience due to its location at the southern edge of the Brecon Beacons National Park, blending natural beauty with rich industrial heritage. You'll find routes through rolling hills, lush forests, tranquil reservoirs like Pontsticill Reservoir, and alongside historic elements such as viaducts and old tramroads.
The running routes in Merthyr Tydfil are highly regarded by the komoot community, holding an average rating of 4.5 stars. Runners often praise the diverse landscapes, from challenging mountain climbs to scenic reservoir loops, and the well-maintained paths that make exploring the area enjoyable.
Yes, Merthyr Tydfil has several easy running routes perfect for beginners. For instance, the Running loop from Merthyr Tydfil is a moderate 6.6 km path with minimal elevation gain. Cyfarthfa Park also offers expansive green spaces ideal for a gentle jog.
Absolutely. Many routes in the area are circular, allowing you to start and finish in the same location. Popular options include the scenic Pontsticill Reservoir – Pontsticill Reservoir loop from Merthyr Tydfil and the Hengoed Viaduct – Hengoed Viaduct loop from Treharris, which incorporates parts of the Taff Trail.
Many trails in Merthyr Tydfil are dog-friendly, especially those in the Brecon Beacons National Park and along the Taff Trail. It's always recommended to keep your dog on a lead, especially near livestock or in nature reserves like the Taff Fechan, and to check specific route guidelines for any restrictions.
Running in Merthyr Tydfil offers views of both natural and historical landmarks. You can pass by impressive structures like the Pontsarn Viaduct, explore the dramatic wooded gorge of the Taff Fechan Nature Reserve, or enjoy the serene beauty of Pontsticill Reservoir. The Taff Trail also features historic tramroad sections.
For experienced runners seeking a challenge, Merthyr Tydfil is an excellent base. The Pen y Fan – Cribyn Summit loop from Merthyr Tydfil is a demanding 52.7 km route with significant elevation gain, taking you through the heart of the Brecon Beacons National Park.
Merthyr Tydfil has public transport links that can help you reach various trailheads. The Taff Trail, for example, is accessible from several points within the town and surrounding villages, which are served by local bus routes. For specific routes, checking local bus schedules is advisable.
Yes, several routes are suitable for families. Cyfarthfa Park offers gentle paths and open spaces. The Taff Trail, particularly its flatter sections, provides a safe and enjoyable environment for family runs. Shorter, moderate loops like the Running loop from Troed-y-rhiw are also good options.
Spring and autumn generally offer the most pleasant running conditions in Merthyr Tydfil, with milder temperatures and beautiful scenery as the landscape changes. Summer can be warm, especially on exposed trails, while winter runs require appropriate gear due to colder weather and potentially wet or icy conditions, particularly in the Brecon Beacons.
For a dedicated 5k run, Merthyr Tydfil hosts a parkrun at Merthyr Leisure Village, offering a timed 5k course on tarmac paths. Additionally, many of the shorter loops available on komoot, such as the Running loop from Merthyr Tydfil, can be adapted or are close to a 5k distance.
The diverse landscapes of Merthyr Tydfil, from the Brecon Beacons to the Taff Valley and its reservoirs, provide excellent opportunities for wildlife spotting. Keep an eye out for various bird species, especially around the reservoirs, and other local fauna in the wooded and open areas. The Taff Fechan Nature Reserve is particularly rich in biodiversity.


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