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North Wales
Gwynedd

Yr Eifl National Nature Reserve

The best walks and hikes around Yr Eifl National Nature Reserve

4.7

(215)

1,714

hikers

49

hikes

Hiking around Yr Eifl National Nature Reserve features a landscape dominated by three prominent hills, often referred to as "The Rivals," which include the Iron Age hillfort of Tre'r Ceiri. The terrain consists of ancient settlements, rocky outcrops, and elevated paths offering expansive views over the Llŷn Peninsula. The area provides a mix of easy and moderate hiking trails suitable for various experience levels.

Best hiking trails around Yr Eifl National Nature Reserve

  • The most popular hiking route is Tre'r…

Last updated: May 11, 2026

4.3

(4)

38

hikers

#1.

Tre'r Ceiri Hillfort – Ascent to Tre'r Ceiri Hillfort loop from Llanaelhaearn

3.57km

01:23

250m

250m

Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.

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Easy

Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Moderate
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Embark on a rewarding hike on the Llŷn Peninsula with the Tre'r Ceiri & Yr Eifl / Garn Canol from Llithfaen — Llŷn trail. This moderate route covers 4.1 miles…

Moderate

4.9

(14)

77

hikers

Embark on the Yr Eifl and Tre'r Ceiri Loop, a moderate hike covering 7.3 miles (11.8 km) with a significant 1995 feet (608 metres) of elevation gain. This route typically…

Moderate

Embark on the Yr Eifl / Garn Ganol loop from Llithfaen, an easy hike that takes you through the dramatic landscape of the Llŷn Peninsula. This route offers panoramic 360-degree…

Easy
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Popular around Yr Eifl National Nature Reserve

Cycling around Yr Eifl National Nature Reserve

Running Trails around Yr Eifl National Nature Reserve

Road Cycling Routes around Yr Eifl National Nature Reserve

MTB Trails around Yr Eifl National Nature Reserve

Tips from the Community

Planlos
April 17, 2025, Trailhead to Tre'r Ceiri Hillfort

small parking bay available

Translated by Google

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Tre'r Ceiri is a truly spectacular hillfort dating back to the Iron Age. In English the name means 'town of the giants.' A giant of a hillfort it is too and one of the best preserved of all with stunning views across the Llŷn Peninsula. The settlement is surrounded by stone walls that are amazingly largely intact. Some of these walls are four metres high in places. Inside the fort are the remains of around 150 houses which in days gone by would have had turfed roofs. A truly amazing place to visit!

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There are fantastic views to be had from here towards the sea, to Trevor, to the sea stacks....everywhere!

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Tre'r Ceiri is a truly spectacular hillfort dating back to the Iron Age. In English the name means 'town of the giants.' A giant of a hillfort it is too and one of the best preserved of all with stunning views across the Llŷn Peninsula. The settlement is surrounded by stone walls that are amazingly largely intact. Some of these walls are four metres high in places. Inside the fort are the remains of around 150 houses which in days gone by would have had turfed roofs. A truly amazing place to visit!

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The three stones above Nant Gwytheryn (the Welsh language and heritage centre), perhaps representing the three peaks of Yr Eifl. From here a short detour to the centre can be made for a cake in the cafe.

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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 it can be easy to get lost in the landscapes and forget the incredibly tough conditions these men worked in. The stones stand under the watchful gaze of Yr Eifl.

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Kit P
October 11, 2022, View from Trefor Pier

Trefor is a Welsh village occupying a stunning spot. It sits between the sea and several large, craggy hills, providing an incredible backdrop no matter which way you look. To get the best views of its location, head out to its pier, which sees sweet little fishing boats in the foreground of the mountain-like hills.

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The coast path here offers dramatic views up to the Yr Eifl quarry, now long abandoned. You can still see the workings clearly, with imposing buildings seemingly carved into the rock itself. In the foreground sit a couple of former quarry houses, now holiday cottages. Painted white, they almost seem to glow against the grass and rock around them.

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Frequently Asked Questions

Are there easy hiking trails in Yr Eifl National Nature Reserve?

Yes, Yr Eifl National Nature Reserve offers a good selection of easy hiking trails. There are 19 easy routes available, making it accessible for various fitness levels. An example is the Tre'r Ceiri Hillfort – Ascent to Tre'r Ceiri Hillfort loop from Llanaelhaearn, which is 2.2 miles (3.6 km) long and takes about 1 hour 20 minutes.

What is the typical length and duration of hikes in Yr Eifl National Nature Reserve?

Hikes in Yr Eifl National Nature Reserve vary in length and duration. You can find shorter, easy loops like the Tre'r Ceiri Hillfort – Ascent to Tre'r Ceiri Hillfort loop from Llanaelhaearn at 2.2 miles (3.6 km) taking around 1 hour 20 minutes. For a more moderate challenge, the Tre'r Ceiri & Yr Eifl / Garn Canol from Llithfaen — Llŷn is 4.1 miles (6.5 km) and typically takes about 2 hours 10 minutes.

Where can I find parking for hiking in Yr Eifl National Nature Reserve?

Parking is generally available at or near the trailheads for popular routes. For instance, routes starting from Llanaelhaearn or Llithfaen often have designated parking areas. It's advisable to check specific route descriptions on komoot for detailed parking information, as options can vary.

Are there family-friendly hiking options in Yr Eifl National Nature Reserve?

Absolutely. The reserve has several easy trails suitable for families. The relatively short distances and manageable elevation gains on routes like the Tre'r Ceiri Hillfort – Ascent to Tre'r Ceiri Hillfort loop from Llanaelhaearn make them ideal for families with children. These trails often lead to interesting historical sites like the Tre'r Ceiri hillfort, adding an educational element to the walk.

Can I bring my dog on hikes in Yr Eifl National Nature Reserve?

Yes, dogs are generally welcome on trails in Yr Eifl National Nature Reserve. However, it's crucial to keep them on a lead, especially near livestock, ground-nesting birds, or in areas with sensitive wildlife. Always follow the Countryside Code, clean up after your dog, and ensure they don't disturb other hikers or local fauna.

What is the best time of year to hike in Yr Eifl National Nature Reserve?

The best time to hike in Yr Eifl National Nature Reserve is typically from late spring to early autumn (May to September). During these months, the weather is generally milder, and the trails are less likely to be muddy. Summer offers longer daylight hours and vibrant landscapes, though it can also be busier. Always check the local weather forecast before heading out, as conditions can change rapidly on the Llŷn Peninsula.

What should I wear for hiking in Yr Eifl National Nature Reserve?

Given the varied terrain and potential for changeable weather, it's best to wear layers. Sturdy hiking boots with good ankle support are recommended, especially for rocky sections and ascents. Bring waterproof and windproof outer layers, even on sunny days, as the summits can be exposed. Sun protection, a hat, and plenty of water are also essential.

Is winter hiking possible in Yr Eifl National Nature Reserve?

Winter hiking is possible, but it requires careful preparation. Days are shorter, and weather conditions can be more challenging, with potential for strong winds, rain, and colder temperatures. Some paths might be muddy or slippery. If hiking in winter, ensure you have appropriate warm, waterproof clothing, good navigation skills, and check forecasts for ice or snow. The Yr Eifl / Garn Ganol loop from Llithfaen — Llŷn is an easy option that might be more manageable in winter conditions.

Are there circular walks around Yr Eifl National Nature Reserve?

Yes, many of the routes in Yr Eifl National Nature Reserve are designed as circular walks, allowing you to start and end at the same point. Examples include the Ascent to Tre'r Ceiri Hillfort – Yr Eifl Summit loop from Llanaelhaearn, which offers a moderate challenge, and the longer Yr Eifl and Tre'r Ceiri Loop for those seeking a more extensive journey.

What do other hikers enjoy the most about hiking in Yr Eifl National Nature Reserve?

The area is highly rated by the komoot community, with an average score of 4.7 stars from over 200 reviews. Reviewers often praise the panoramic views over the Llŷn Peninsula, the historical significance of the Tre'r Ceiri hillfort, and the varied terrain that offers both gentle walks and more challenging ascents. The sense of ancient history and natural beauty are frequently highlighted.

Are there any challenging routes in Yr Eifl National Nature Reserve?

While there are no routes classified as 'difficult' in the reserve, several moderate trails offer a good challenge, especially those that involve ascents to the summits of Yr Eifl. The Yr Eifl and Tre'r Ceiri Loop, for example, is a moderate 7.3-mile (11.8 km) route with over 600 meters of elevation gain, providing a substantial workout and rewarding views.

What kind of landscapes can I expect to see while hiking in Yr Eifl National Nature Reserve?

Yr Eifl National Nature Reserve is characterized by a dramatic landscape dominated by three prominent hills, often called 'The Rivals.' You'll encounter ancient settlements, including the well-preserved Iron Age hillfort of Tre'r Ceiri, rocky outcrops, and elevated paths. The views are expansive, stretching across the Llŷn Peninsula and out to the Irish Sea, offering a mix of coastal and mountainous scenery.

Most popular routes around Yr Eifl National Nature Reserve

Family-friendly hikes around Yr Eifl National Nature Reserve

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