4.9
(11)
199
riders
19
rides
Road cycling routes around Llanrhian traverse the scenic Pembrokeshire coastline, offering varied terrain for cyclists. The region is characterized by its undulating coastal roads, often providing views of the Irish Sea. While there are no significant mountain ranges, the area features numerous hills and valleys that contribute to elevation changes on routes. Cyclists can expect a mix of open stretches and sections passing through small villages and rural landscapes.
Last updated: July 5, 2026
5.0
(5)
91
riders
31.7km
01:27
310m
300m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
4.6
(5)
30
riders
50.8km
02:36
660m
660m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.

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14
riders
43.1km
02:12
590m
590m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
5
riders
50.1km
02:33
760m
760m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
10
riders
45.6km
02:06
410m
410m
Moderate road ride. Good fitness required. Mostly well-paved surfaces and easy to ride.
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Quite unusual, this church: its tower, its cruciform plan and - that I’ve not seen before - it’s oriented SW-NE. (And why not??) Inside, it’s peaceful calm, welcoming and with a cared-for atmosphere. Go visit if you’re passing.
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A beautiful old mill with a lovely café, a lovely garden, and a small shop. You can also buy their own products there, such as wool blankets. A very nice stop while cycling or hiking.
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Beautiful old pub! Stopped here after a hike & it was fascinating inside, plenty of locals, of course a lot of tourists (as I was!) But I'd love to come back here sometime & go there for the evening, it just looks like it gets a bit loose!
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Visit this interesting historical site & see how Porthgain used to be
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Probably the best pasties in town! A convenient and tasty treat stop on the bike with a handy stop spot on the square opposite
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Porthgain, a small coastal village in Pembrokeshire, became an industrial hub in the 19th and early 20th centuries. The quarrying activities in Porthgain primarily focused on slate and later on roadstone. The harbour, constructed in 1851, was essential for exporting slate from nearby quarries. Initially, slate was transported to the harbour by horse-drawn tramways and later by steam-powered machinery. By the late 19th century, the industry expanded to include brickmaking using slate waste. The demand for roadstone led to the development of steam-powered crushers and large storage hoppers, which are still visible today. Despite its industrial success, the Great Depression in the inter-war period led to a decline in trade, and by 1931, the quarrying activities had ceased. Today, Porthgain is a conservation area, preserving its rich industrial heritage and attracting visitors to its historical sites and scenic beauty
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Porthgain is known for its picturesque harbour and rich industrial history. The village was once a bustling industrial port in the early 1900s, primarily involved in the export of slate, bricks, and crushed roadstone. Quarry History: • Slate Quarrying: Slate was the primary industry in Porthgain from around 1850 to 1910. The slate was quarried from nearby locations like Abereiddi and Trwynllwyd and transported to Porthgain via a tramway. • Brickmaking: From 1889 to 1912, bricks were manufactured using waste from the slate operations. The large brick hoppers that dominate the harbour today were used to store crushed dolerite before shipment. • Roadstone Production: After the decline of the slate industry, Porthgain turned to producing crushed roadstone from 1889 until 1931. Today, Porthgain is a conservation area, attracting visitors with its historical charm, scenic views, and local seafood. The harbour remains active, primarily serving local fishermen and recreational boaters.
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Road cycling routes in Llanrhian offer a diverse range of difficulties. You'll find a mix of undulating coastal roads and rolling hills, providing options for various skill levels. Out of 20 available routes, there are 4 easy routes, 15 moderate routes, and 1 challenging route, ensuring there's something for everyone from beginners to more experienced cyclists.
The road cycling routes around Llanrhian vary in length, catering to different preferences. For example, the popular Porthgain Harbour – St David's Cathedral loop from Llanrhian is about 19.7 miles (31.6 km), while the Whitesands Beach – St David's Cathedral loop from Carreg Samson extends to 31.6 miles (50.8 km). Most routes fall within this range, offering substantial rides with scenic views.
Yes, the majority of road cycling routes around Llanrhian are designed as circular loops, allowing you to start and finish at the same point. This makes planning your ride convenient, as you won't need to arrange return transport. Routes like the Blue Lagoon – Mathry Hill Climb loop from Abereiddy are excellent examples of the circular options available.
Llanrhian's coastal location means many routes offer stunning scenic viewpoints. You can expect panoramic views of the Irish Sea, dramatic cliffs, and picturesque harbours. Notable viewpoints include Carn Llidi Summit View, Garn Fawr summit and trig point, and St Justinian Lifeboat Station, which provide excellent photo opportunities and places to rest.
Beyond the stunning coastal scenery, you can encounter several interesting landmarks and natural attractions. These include historical sites like the Carreg Samson Dolmen, and natural wonders such as the Blue Lagoon, Abereiddy. Coastal features like Porthclais Harbour and Cliffs also add to the experience.
While many routes in Llanrhian feature undulating terrain and some significant elevation changes, there are easier options suitable for families or those seeking a more relaxed ride. Look for routes categorized as 'easy' in the guide, which typically have less climbing and shorter distances, making them more manageable for a family outing.
The best time for road biking in Llanrhian is generally from spring through autumn (April to October). During these months, the weather is typically milder, with less rain and longer daylight hours, making for more enjoyable rides along the exposed coastal roads. Summer offers the warmest temperatures, but spring and autumn can provide quieter roads and beautiful scenery.
Road cycling in Llanrhian during winter can be challenging due to the exposed coastal nature of many routes. You can expect colder temperatures, stronger winds, and a higher chance of rain. Shorter daylight hours also mean careful planning is needed. While some dedicated cyclists ride year-round, it's advisable to be well-prepared for adverse weather conditions and check forecasts before heading out.
Parking is generally available in and around the small villages and popular coastal spots that serve as starting points for many routes. For example, Abereiddy Beach is a known parking location and a common starting point for several rides. Always check local signage for parking restrictions and fees.
The road cycling experience in Llanrhian is highly regarded by the komoot community, with an impressive average score of 4.9 stars from 10 reviews. Cyclists often praise the stunning coastal views, the variety of terrain, and the opportunity to explore charming villages and historical sites along the routes.
Yes, for experienced riders seeking a challenge, Llanrhian offers routes with significant elevation gain and longer distances. While most routes are moderate, there is at least one route categorized as 'difficult' among the 20 available. These routes will test your endurance with more demanding climbs and extended mileage, such as the Abercastle Harbour – Mathry Hill Climb loop from Carreg Samson which features over 760 meters of ascent.
Public transport options in the rural Llanrhian area can be limited, especially for reaching specific trailheads with a bike. While local bus services connect some villages, it's advisable to check schedules and bike carriage policies in advance. Many cyclists prefer to drive to a starting point or base themselves in a central location like Llanrhian village and cycle directly from there.


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