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United Kingdom
Wales
North Wales
Gwynedd
Pistyll

Tre'r Ceiri & Yr Eifl / Garn Canol from Llithfaen — Llŷn

Routes
Hiking trails & Routes
United Kingdom
Wales
North Wales
Gwynedd
Pistyll

Tre'r Ceiri & Yr Eifl / Garn Canol from Llithfaen — Llŷn

Moderate

4.8

(39)

219

hikers

Tre'r Ceiri & Yr Eifl / Garn Canol from Llithfaen — Llŷn

02:10

6.54km

290m

Hiking

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 (6.5 km) with an elevation gain of 957 feet (292 metres), typically taking around 2 hours and 9 minutes to complete. You will traverse varied terrain, including ancient settlement areas and rocky outcrops, with some steady climbs. From elevated paths, enjoy panoramic views of the Llŷn Peninsula and the Irish Sea, and on clear days, you might even spot Snowdonia or the Isle of Man. Look down over the Nant Gwrtheyrn valley and observe the dramatic walls of the Tre'r Ceiri hillfort as you hike.

While the research does not specify trailhead access or parking details, this circular walk is generally considered enjoyable rather than overly strenuous, despite its climbs and some steep, rocky sections. The trail can be boggy in places, especially after rain, so be sure to wear appropriate footwear. Some parts, particularly the ascent to Garn Ganol, might involve a scramble, so be prepared for varied conditions. Good fitness is recommended to fully enjoy the experience.

What makes this trail truly special is its rich history and unique environment. You will explore Tre'r Ceiri, one of Britain's best-preserved Iron Age hillforts, dating back over 2,000 years. This ancient site, meaning 'town of the giants', features remarkably intact stone walls and the remains of around 150 stone roundhouses, offering a tangible connection to prehistoric life. The route also encompasses the three distinctive peaks of Yr Eifl, often called 'The Rivals', which are a prominent landmark and provide stunning vistas across the region.

Last updated: April 23, 2026

Tips

Your route passes through a protected area

Please check local regulations for:

AHNE Llŷn

Waypoints

A

Start point

Parking

Get Directions

1

12 m

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 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.

Tip by

2

2.69 km

Tre'r Ceiri Hillfort

Highlight • Historical Site

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!

Tip by

3

3.93 km

Yr Eifl Summit

Highlight • Natural Monument

It’s a fact that proximity to the sea makes a peak feel higher. Yr Eifl has its ankles in Caernarfon Bay, and from its top Tremadog Bay on the other side of the Llyn Peninsula seems almost as close. As such, this modest mountain has a genuine loftiness, along with three summits and an Iron Age hill fort.

Tip by

B

6.54 km

End point

Parking

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Way Types & Surfaces

Way Types

4.12 km

1.58 km

764 m

< 100 m

Surfaces

3.84 km

1.58 km

764 m

< 100 m

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Elevation

Elevation

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Weather

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Tuesday 7 July

22°C

13°C

-- %

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Comments

March 6, 2025,Yr Eifl and Tre'Ceiri Fort
Great views, some scrambling over lose stones
Walk clock wise to make it easier
Absolutely, if the parking around Pen y pass is anything to go by Snowdon would have been unbelievably busy 😢 I believe Moel Siabod has amazing views so that is next on the list but might be next year now. As we were on the peninsula we thought it would be rude not to do these 3 peaks and the …
September 23, 2023,Yr Eifl, Llyn Peninsula
The climb to Yr Eifl is very(!) difficult, actually more climbing over 1km and very steep (sometimes a 25% gradient over large scree, on the left the abyss is still quite gentle with heather, requires sure-footedness and concentration, even on the descent or if you have to The route runs the other way around, not recommended in or after rain, …

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