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United Kingdom
Wales
South Wales
Pembrokeshire

Mynachlog-Ddu

The best MTB trails around Mynachlog-Ddu

3.1

(22)

205

riders

6

rides

Mountain biking around Mynachlog-Ddu offers a variety of trails through the Preseli Hills and surrounding landscapes. The region features rolling hills, dense forest areas like Pantmaenog, and the Llys-y-Frân Reservoir. Trails often incorporate former quarry sites and provide diverse terrain for mountain bikers. This area is characterized by its mix of natural and historical features, providing varied riding experiences.

Best mountain bike trails around Mynachlog-Ddu

  • The most popular mountain bike trail is Llys-y-Frân Reservoir Cycle Trail, an easy 6.3 miles (10.2 km) trail that takes approximately 55 minutes to complete. This route offers a scenic ride around the reservoir.
  • Another top favourite among local mountain bikers is Preseli Hills Loop, a moderate 16.2 miles (26.0 km) path. This loop navigates the varied terrain of the Preseli Hills, providing a longer ride.
  • Local mountain bikers also love the Preseli Hills loop via Rosebush Quarry, an 11.0 miles (17.7 km) trail leading through the Preseli Hills and past Rosebush Quarry, often completed in about 1 hour 30 minutes.
  • Mountain biking around Mynachlog-Ddu is defined by its Preseli Hills, reservoir paths, and forest trails. The network offers options for different ability levels, from easy reservoir loops to more challenging hill climbs.
  • The routes in Mynachlog-Ddu are highly rated by the komoot community with an average score of 3.4 stars from over 20 reviews. More than 200 mountain bikers have used komoot to explore Mynachlog-Ddu's varied terrain.

Last updated: May 11, 2026

4.8

(9)

153

riders

#1.

Llys-y-Frân Reservoir Cycle Trail

10.2km

00:53

130m

130m

Easy 6.4-mile mountain biking loop around Llys-y-Frân Lake, offering scenic views and family-friendly amenities.

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Easy

4.0

(6)

25

riders

26.0km

02:04

440m

440m

Embark on the Preseli Hills Loop, a moderate mountain biking route that takes you through classic Welsh landscapes. You'll navigate treeless, open hills, wooded valleys, and rocky tors, experiencing a wild and historically rich journey. The 16.2-mile (26.0 km) trail involves a significant climb of 1444 feet (440 metres), offering panoramic views across Cardigan Bay. Expect to complete this adventure in about 2 hours and 3 minutes, riding across natural moorland and forestry tracks. As you pedal, you'll encounter ancient landmarks like the notable Waun Mawn Standing Stones, adding a unique historical layer to your ride.

Before you set out, be aware that conditions on the Preseli Hills Loop can vary significantly. Sections of the trail can become boggy and challenging, especially during wet weather and on ascents, so prepare for varied terrain. Due to the natural and less-defined nature of many paths, carrying a guidebook or using GPS for navigation is highly recommended. While an e-bike can assist on the steeper, muddier climbs, you might still find yourself needing to push your bike at certain points.

This route is a journey through time, showcasing the unique geology and rich cultural heritage of the Preseli Hills. You'll discover ancient burial chambers and other historical artifacts scattered across the landscape, providing a glimpse into the past. The open hills offer expansive vistas, and on clear days, you can even see as far as Snowdonia, making the Preseli Hills Loop a truly distinctive experience in the Pembrokeshire Coast National Park.

Moderate
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Embark on a moderate mountain biking adventure through the Preseli Hills loop via Rosebush Quarry. This 11.0-mile (17.7 km) route features a diverse landscape, from forestry tracks and open moorland to ancient bridleways. You will climb 1120 feet (341 metres) over varied terrain, including rocky sections and grassy singletrack, with the ride typically taking around 1 hours and 31 minutes. Expect panoramic views across west Wales, and on clear days, you might even spot Snowdonia or Ireland's Wicklow Hills, all while passing through the wild, ancient feel of the treeless hills and craggy tors.

To make the most of your ride, consider tackling this loop during drier months, such as spring or summer. This helps avoid the boggiest sections, which can be challenging even in warmer weather, and ensures better conditions for enjoying the views. Be prepared for quickly changing weather in this exposed landscape, and bring good navigation skills. The trail begins near Rosebush village, transitioning from minor roads to dirt tracks and forest roads.

This trail is steeped in history, featuring the 5,000-year-old Golden Road, an ancient moorland trail central to Celtic folklore. You will also pass by sites like Carn Menyn, believed to be the source of Stonehenge's bluestones, and other prehistoric monuments. The disused slate quarry at Rosebush serves as a distinctive landmark, reflecting the area's industrial past and adding another layer to the rich narrative of this Pembrokeshire Coast National Park route.

Moderate

Easy mountain bike ride. Great for any fitness level. Suitable for all skill levels.

Easy

1.0

(1)

1

riders

Embark on a diverse mountain biking adventure through the Preseli Hills and around Llys-y-frân dam. This moderate route spans 33.0 miles (53.1 km) and features a total elevation gain of 2948 feet (898 metres), offering a rewarding challenge that typically takes around 4 hours and 12 minutes to complete. You'll traverse ancient bridleways and purpose-built trails, enjoying panoramic views from the historic Golden Road in the Preseli Hills before descending to the wooded slopes surrounding the Llys-y-frân Reservoir.

Planning your ride requires good fitness and advanced riding skills, especially for the more remote sections within the Preseli Hills. Be aware that parts of the Golden Road can become boggy in wet conditions, potentially requiring you to push your bike. The Llys-y-frân activity center provides convenient amenities like bike hire, a pump track, and a skills area, making it a great starting or finishing point for your journey.

This loop offers a unique blend of natural and structured mountain biking experiences within the Pembrokeshire Coast National Park. You'll ride along the historic Golden Road, an 11-kilometer bridleway that follows the main ridge of the Preseli Hills, known for its far-reaching vistas. The route then transitions to the modern trails winding through the scenic area around the Llys-y-frân Reservoir, providing a varied and engaging ride that highlights the region's diverse landscapes.

Moderate

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Popular around Mynachlog-Ddu

Preseli Hills – Pembrokeshire walks

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Tips from the Community

Grace
March 19, 2025, Rosebush Quarry

A lovely little tucked away quarry which is great to have a dip mid run. The water is freezing though so bare that in mind! Great area for running and exploring the Presellis

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A good place to ride circuit of the reservoir with some short sections of MTB trails

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A very scenic spot to take on the Preseli views

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Andy
October 7, 2024, Rosebush Quarry

A great place to ride with some easy trails

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Andy
October 7, 2024, Llys y Frân Café

Good cafe refreshments after riding the trails here

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A wonderfully wild bridleway that runs along the summit ridge of the Preseli hills. Best ridden from west to east so that it's predominantly downhill and much better in dry weather, it gets a bit boggy in the winter.

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Great selection of varied trails around the reservoir that branch off the family cycle route. Some quite challenging if it’s your first visit. The pump track and trail at the start is great to warm up and fun for the kids. Bike hire is available if needed.

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Great fun. Fast easy gravel tracks

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Frequently Asked Questions

How many mountain bike trails are available around Mynachlog-Ddu?

There are 7 mountain bike trails listed around Mynachlog-Ddu on komoot, offering a range of experiences from easy to moderate difficulty.

Are there easy mountain bike trails suitable for beginners or families?

Yes, Mynachlog-Ddu offers easy trails perfect for beginners and families. The Llys-y-Frân Reservoir Cycle Trail is a popular choice, providing a scenic and relatively flat ride around the reservoir. Another easy option is the Pantmaenog Forest and Rosebush Quarry loop.

What kind of terrain can I expect on the mountain bike trails in Mynachlog-Ddu?

The trails around Mynachlog-Ddu offer a diverse mix of terrain. You'll encounter rolling hills, dense forest sections, especially in areas like Pantmaenog, and paths around the Llys-y-Frân Reservoir. Many routes also incorporate former quarry sites, adding to the varied landscape of the Preseli Hills.

Are there challenging mountain bike trails for experienced riders?

While there are no trails classified as 'difficult' in the immediate area, experienced riders can find longer, moderate routes that offer a good challenge. The Preseli Hills & Llys-y-frân dam loop, for example, is over 50 km long with significant elevation gain, providing a demanding ride through varied landscapes.

What are the typical lengths and durations of mountain bike trails in this region?

Trail lengths vary significantly. Easy routes like the Llys-y-Frân Reservoir Cycle Trail are around 10 km and take under an hour. Moderate loops, such as the Preseli Hills Loop, can be over 25 km and take a few hours to complete, while longer routes can extend to over 50 km.

When is the best time of year to go mountain biking in Mynachlog-Ddu?

Spring and autumn generally offer the most pleasant conditions for mountain biking in Mynachlog-Ddu, with milder temperatures and beautiful scenery. Summer can also be good, but trails may be busier. Winter riding is possible, but be prepared for potentially wet and muddy conditions, especially on unpaved sections, and shorter daylight hours.

What do other mountain bikers enjoy most about the trails in Mynachlog-Ddu?

The mountain bike trails around Mynachlog-Ddu are highly rated by the komoot community, with an average score of 3.4 stars. Riders often praise the varied terrain, the scenic views of the Preseli Hills, and the peaceful atmosphere of routes like those around the Llys-y-Frân Reservoir and through Pantmaenog Forest.

Are there any notable viewpoints or attractions along the mountain bike trails?

Yes, the region offers several interesting points. While riding, you might encounter views of the Preseli Hills. Nearby attractions include natural monuments and viewpoints such as Carningli Mountain, Foel Cwmcerwyn summit, and the ancient Foel Drygarn Hillfort and Cairns. The Bedd Arthur Stone Circle is also a significant historical site in the area.

Are there mountain bike trails that are loop routes?

Many of the mountain bike trails in Mynachlog-Ddu are designed as loops, allowing you to start and finish at the same point. Examples include the Preseli Hills Loop and the Preseli Hills loop via Rosebush Quarry.

Where can I find parking for mountain biking in Mynachlog-Ddu?

Parking is generally available at key access points for popular trails. For instance, the Llys-y-Frân Reservoir often has dedicated parking facilities for visitors accessing the cycle trail. For other routes, look for public car parks in nearby villages or designated trailheads, though options may be more limited in remote areas of the Preseli Hills.

Can I access mountain bike trails in Mynachlog-Ddu using public transport?

Public transport options to reach the more remote mountain bike trailheads around Mynachlog-Ddu can be limited. It's advisable to check local bus schedules in advance, as services to smaller villages in the Preseli Hills are infrequent. Many visitors opt for personal vehicles to access the starting points of their rides.

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