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.
Last updated: May 11, 2026
4.3
(4)
38
hikers
Easy hike. Great for any fitness level. Easily-accessible paths. Suitable for all skill levels.
2
hikers
5.50km
02:05
360m
360m
Moderate hike. Good fitness required. Easily-accessible paths. Suitable for all skill levels.

Sign up for free
4.8
(37)
213
hikers
6.54km
02:10
290m
290m
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…
4.9
(14)
77
hikers
11.8km
04:05
610m
610m
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…
4.6
(14)
101
hikers
4.30km
01:33
250m
250m
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…
Get access to more routes and recommendations from other explorers.
Sign up for free
Already have an account?
Our route recommendations are based on thousands of hikes, rides, and runs completed by other people on komoot.
Start today with a free account
Your next adventure awaits.
Login or Signup
small parking bay available
0
0
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!
1
0
There are fantastic views to be had from here towards the sea, to Trevor, to the sea stacks....everywhere!
2
0
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!
2
0
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.
0
0
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.
2
0
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.
2
0
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.
2
0
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.


Browse the best Hikes in other regions.