4.6
(151)
8,808
riders
631
rides
Road cycling in Carmarthenshire offers diverse terrain, from tranquil country lanes to challenging mountain climbs. The region features the Black Mountains, providing significant ascents, alongside picturesque river valleys such as the Tywi and Cothi. Coastal routes along Carmarthen Bay and through the Millennium Coastal Park offer flatter, well-surfaced options. Forested areas like Brechfa and Crychan also contribute to the varied landscape suitable for road cycling.
Last updated: April 24, 2026
5.0
(2)
36
riders
115km
06:00
2,000m
2,000m
Embark on a challenging racebike journey through the Bannau Brycheiniog National Park with the Black Mountain, Devil's Elbow & Usk Reservoir loop. This difficult 71.7-mile (115.4 km) route will test your endurance as you climb 6574 feet (2004 metres) over approximately 6 hours. You will experience expansive moorland and rugged peaks, with panoramic views across the Towy Valley. Expect dramatic scenery and serene water views around the Usk Reservoir.
This demanding road cycling route requires a very good level of fitness. Be aware that some initial segments for the Black Mountain climb from Pont Aber might be unpaved, which can be difficult for road bikes. The A4069 section can also be narrow with traffic, so stay alert and plan your ride carefully. Ensure you are prepared for a full day on the saddle.
This loop is renowned for its iconic climbs, including the Black Mountain Pass, which many compare to the Alps, and the notorious Devil's Elbow. As you ride, you might spot wildlife like Red Kites, especially near the Usk Reservoir. The route offers a unique opportunity to immerse yourself in the rugged beauty of the Welsh landscape.
41
riders
49.3km
02:17
470m
470m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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5.0
(2)
33
riders
45.2km
02:19
540m
540m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
30
riders
42.9km
02:34
900m
900m
Cycle the Black Mountain climb loop from Llandeilo, a moderate 26.7-mile route with 2944 feet of elevation gain in Bannau Brycheiniog Nation
37
riders
22.0km
00:59
150m
150m
Easy road ride. Great for any fitness level. Mostly well-paved surfaces and easy to ride.
17
riders
104km
05:12
1,370m
1,370m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
5.0
(1)
7
riders
64.1km
03:14
840m
840m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
9
riders
76.2km
04:05
1,190m
1,190m
This difficult 47.3-mile road cycling loop in Bannau Brycheiniog National Park features a challenging climb into the Black Mountain.
5.0
(1)
13
riders
72.7km
03:34
820m
820m
This moderate 45.2-mile road cycling loop from Carmarthen Velodrome offers scenic views and a challenging 2686-foot elevation gain.
4
riders
72.4km
04:05
1,420m
1,420m
Hard road ride. Very good fitness required. Mostly well-paved surfaces and easy to ride.
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Free parking opposite the convenience store/pub. Cafe on the foreshore is excellent.
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Great climb, long but not too steep. Views are absolutely amazing !!!
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Bring plenty of water on this trip as shops are few and far between!
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Great views of the Black Mountain
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Like being dropped into another planet. Nothing but you and the sheep
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Carmarthenshire offers a wide selection of road cycling routes, with over 600 routes available on komoot. These range from easy rides to challenging mountain climbs, catering to all skill levels.
Carmarthenshire's terrain is incredibly diverse. You'll find challenging ascents in the Black Mountains, picturesque routes through the Tywi and Cothi Valleys, and flatter, well-surfaced coastal paths along the Millennium Coastal Park near Llanelli. Forested areas like Brechfa and Crychan also offer varied landscapes.
The best time for road cycling in Carmarthenshire is generally from spring through autumn, when the weather is milder and more predictable. Summer offers the longest daylight hours, while spring and autumn provide beautiful scenery with fewer crowds. Winter cycling is possible but requires careful planning due to potentially colder and wetter conditions, especially in higher elevations.
Yes, Carmarthenshire offers several easy and family-friendly options. The Millennium Coastal Park in Llanelli provides a mostly flat, traffic-free route. For a gentle loop through scenic countryside, consider the Nantgaredig loop from Carmarthen Velo, which is rated easy and covers just over 22 km.
Absolutely. The Black Mountains are a highlight for experienced cyclists, offering significant climbs like the renowned Black Mountain climb. Routes such as the Black Mountain, Devil's Elbow & Usk Reservoir loop from Llandovery provide over 2000 meters of elevation gain over 115 km, making for a demanding ride. Another challenging option is the From Brynaman to Usk Reservoir via Black Mountain, which also features substantial climbing.
Carmarthenshire's routes are rich in natural beauty. You can enjoy stunning views of the Black Mountains, the tranquil Tywi and Cothi Valleys, and the expansive Brecon Beacons National Park. The area around Llyn Brianne also offers impressive woodland vistas. For specific mountain views, consider routes that pass near highlights like Picws Du summit & view of Llyn y Fan Fach or Fan Foel summit.
Yes, many routes weave past significant historical and cultural sites. You can cycle past the remote ruins of castles such as Carreg Cennen Castle, Dinefwr, and Dryslwyn. Other notable attractions include the National Botanic Garden of Wales, Aberglasney Gardens, and the Dylan Thomas Boat House. Pretty market towns like Llandovery and Llandeilo also offer charming stops.
Many of Carmarthenshire's road cycling routes are designed as loops, allowing you to start and finish in the same location. Examples include the Ferryside from Llanelli loop, the Llandovery to River Cothi Valley loop, and the Black Mountain climb loop from Llandeilo.
Carmarthenshire is known for being bike-friendly, with numerous cafes, pubs, and accommodations catering to cyclists. Charming market towns like Llandovery and Llandeilo are excellent places to stop for refreshments. Many routes are designed to pass through or near these towns, offering convenient pit stops.
The area is highly rated by the komoot community, with an average score of 4.6 stars from over 140 reviews. Cyclists frequently praise the diverse terrain, from challenging mountain passes to serene river valleys and accessible coastal paths, and the stunning natural beauty that defines the region.
Yes, Carmarthenshire offers several options for longer rides. The Black Mountain, Devil's Elbow & Usk Reservoir loop from Llandovery is a challenging 115 km route. Another substantial ride is the 2019 OVO Energy Women's Tour - Carmarthenshire loop, covering over 104 km and featuring significant climbs.
Yes, you can enjoy beautiful coastal views, particularly along Carmarthen Bay. The Ferryside from Llanelli loop and the Carmarthen Bay Coastal loop from Pembrey Country Park are excellent choices for experiencing the region's scenic coastline.


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