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Routes
Mountain biking trails
United Kingdom
Wales
North Wales
Gwynedd
Llanaelhaearn

Lleyn Peninsula loop of Yr Eifl

Moderate

4.3

(3)

13

riders

Lleyn Peninsula loop of Yr Eifl

01:54

22.2km

490m

Mountain biking

This moderate 13.8-mile mountain bike loop on the Lleyn Peninsula offers spectacular views and challenging terrain around Yr Eifl.

Last updated: February 26, 2026

Tips

Your route passes through protected areas

Please check local regulations for:

AHNE Llŷn

Waypoints

A

Start point

Parking

Get Directions

1

14.7 km

Yr Eifl Miners' Memorial Stones

Highlight • Monument

These grand stones at the Yr Eifl car park are a memorial to the miners who quarried here in the 19th century. This area has a huge industrial history and …

Tip by

2

16.6 km

Old Quarry Descent, Llŷn Peninsula

Highlight (Segment) • Trail

A pleasantly winding descent on double track through the old quarry workings with super views along the Lleyn Peninsula.

Tip by

3

20.8 km

View of Tre'r Ceiri Iron Age Hill Fort

Highlight • Historical Site

A scenic single track road with views towards Tre'r Ceiri, the historic and perhaps best-preserved Iron Age hill forts in the UK.

Tip by

B

22.2 km

End point

Parking

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Way Types & Surfaces

Way Types

12.0 km

7.85 km

2.44 km

Surfaces

7.97 km

4.67 km

2.75 km

2.61 km

2.36 km

1.88 km

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Elevation

Elevation

Nothing selected – click and drag below to see the stats for a specific part of the route.

Highest point (350 m)

Lowest point (50 m)

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Weather

Powered by Foreca

Wednesday 13 May

12°C

7°C

55 %

Additional weather tips

Max wind speed: 32.0 km/h

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This route was planned by komoot.

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Frequently Asked Questions

How long does it typically take to complete the Lleyn Peninsula loop of Yr Eifl?

The average mountain biker can expect to complete this 22.2-kilometer loop in approximately 1 hour and 54 minutes. However, this duration can vary based on your fitness level, riding speed, and how often you stop to enjoy the views or navigate challenging sections.

What is the terrain like on this mountain bike loop?

The loop offers a diverse surface, including paved sections, asphalt, gravel, natural trails, and unpaved paths. You'll encounter rocky scrambles and old quarry workings. Be aware that some segments can be 'greasy' or slippery with wet roots, especially in damp conditions, potentially requiring you to push your bike at times.

Is the Lleyn Peninsula loop of Yr Eifl suitable for beginner mountain bikers?

This trail is classified as a 'moderate mountain bike ride' and demands good fitness and advanced riding skills. It corresponds approximately to an STS S2 rating. While not always overly technical, certain sections can be challenging, so it's generally not recommended for beginners.

What notable landmarks or viewpoints can I expect to see along the route?

The route offers spectacular panoramic views across the entire Lleyn Peninsula, Snowdonia National Park, and the Tudwal Islands on clear days. You'll pass by the poignant Yr Eifl Miners' Memorial Stones, experience the thrilling Old Quarry Descent, Llŷn Peninsula, and get a fantastic View of Tre'r Ceiri Iron Age Hill Fort, one of the best-preserved in the UK.

Where can I park to access the trailhead for this loop?

While specific parking details aren't provided in the route data, trails in this area typically have designated parking near popular access points or villages. It's advisable to check local signage or online maps for parking options closest to the start of the loop, often in or near the villages at the base of Yr Eifl.

Are dogs allowed on the Yr Eifl mountain bike loop?

Yes, dogs are generally allowed on trails in the Yr Eifl area. However, as the route passes through areas with sheep and potentially other livestock, it is crucial to keep your dog under strict control, preferably on a leash, to protect wildlife and farm animals.

What is the best time of year to mountain bike this loop?

The best time to ride is typically during the drier months, from late spring to early autumn (May to September). This avoids the 'greasy' and slippery conditions that can occur with wet roots and rocky scrambles in damp weather. Clear days offer the most expansive views.

Do I need any permits or pay an entrance fee to ride this trail?

The Lleyn Peninsula loop of Yr Eifl is located within the Yr Eifl National Nature Reserve. Generally, there are no specific permits or entrance fees required for public access to the trails within the reserve. However, always respect local regulations and signage.

Does this mountain bike route intersect with any other well-known paths?

Yes, the route incorporates sections of other paths. You will ride along parts of the Llŷn Coastal Path and Bwlch yr Eifl. Smaller segments also follow Stryd Yr Afon and New Street.

Are there any cafes or amenities nearby for refreshments after the ride?

While the trail itself is remote, the Lleyn Peninsula has several villages nearby. You can typically find cafes, pubs, and other amenities in towns like Nefyn or Clynnog Fawr, which are a short drive from the Yr Eifl area, perfect for post-ride refreshments.

What kind of wildlife might I encounter on the trail?

The most common wildlife you'll encounter are sheep, which graze freely across the landscape. The area is also home to various bird species. Keep an eye out for yellow gorse, which adds a vibrant splash of color to the scenery.

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