Name:Tre'r Ceiri
Hill number:14347
Height:485.3m / 1592ft
Parent (Ma):1951  Yr Eifl
SMC/RHB Section:30A: Anglesey and the Lleyn Peninsula
Topographical area:WN01 Hebog-anelog
Catchment:Erch, Catchment Boundaries
Watershed:Cardigan Bay
Class:Tump (400-499m)
Grid ref:SH 37442 44726
Summit feature:no feature: highest natural ground
Col:420m  SH371447  
OS map sheet(s):(1:50k) 123
(1:25k) 253 254
Survey:Leica NA730/Leica GS15/Trimble GeoXH 6000
A Performance Evaluation Trimble GeoXH6000 vs Leica Viva GS15.pdf
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Logged Descriptions  (logged by 161 users, only the latest 50 shown - Show all)ByDate of Ascent
from Llanaehaearn via B4417, FP and Yr Eifl top. Very interesting Iron Age remains there.IanHHill30/08/2023
As hill forts go this is certainly the biggest and best preserved that I've seen. From the elevated car park N of Llithfaen and on paths across the shoulder of Yr Eifl.Minto19/07/2023
Fabulous preserved hill fort. Very thick, high walls, especially at the west entrance. Lovely path up to Yr Eifl from the west gate. With Minto & Jill.Dangerous Dave19/07/2023
3 of 3 after night in the Motorhome parked on croes-higol road. From yr eifl down the track and back up and through the passage wall. From the top come back round the other side of yr eifl to get on the track and back down the coast path into treforThe-Z-Man01/06/2023
From car park at south west.welshe04/06/2022
Parked at junction of minor road to SSW. Pleasant fp up through pasture and onto moorland. Then the amazing massive hill fort. And nobody there. Incredible.Campbell Singer25/04/2022
O Maes Parcio yr Eifl.sionbrit29/07/2021
The three Yr Eifl summits - clockwise from Mt Pleasant CP. Good hills - pleasant walk.Crib Goch26/07/2021
From the Mount Pleasant car park along the ROW to the exceptional fortifications of Tre'r Ceiri, then over to the interesting Trig of Yr Eifl and on to the panoramic peak of its North Top. Fascinating walk in fabulous weather - just a shame that Wales was getting trounced at Euro 2020 as we wandered up and down the rocky trails.summitter26/06/2021
Good parking in layby on road at SH380444, although you have to walk back along the road SW to pick up the RoW heading up by the wall. Don't try to cut across the field from the layby to the path - there isn't a way across the wall by the look of things. There is a rough layby by the start of the path, but it is much thinner than the other one. Followed the path up and up through the entrance to the fort to the top. Absolutely fascinating.Wheelsy26/06/2021
Circular of three Yr Eifl tops at an easy pace. Parked near Llithfaen in carpark at SH 353 440. Followed Welsh Coast Path then up steps past mast to Yr Eifl North Top. Down to col then vague path up to Yr Eifl summit. Across another col and up to the impressive stone hillfort at Tre'r Ceiri hillfort. Followed clear undulating paths back to car park. Bright sunny day; warm but rather hazy. Great views.Skip16/04/2021
Great 5 mile circular from road junction just outside Llithfaen, we followed paths across the flanks of Yr Eifl, joined the coast path following it up to its highest point; the col between Yr Eifl and its north top, bagged Yr Eifl north top by following steps up to mast compound then trail over boulders to cairn on top. We then retraced our steps to the col and climbed fairly steeply to Yr Eifl summit, after we followed trails to Tre'r Ceiri then back down to the car. Afterwards we drove around to and bagged Mynydd Carnguwch. Amazing weather; not a cloud in the sky with views of Snowdonia, Plynlimon, Anglesey and the Lleyn Peninsular, you could even spot the Pembrokeshire hills along Cardigan Bay. A few people about.DanTrig14/09/2020
Social run of the Tri Chopa route in reverse. Interesting and well-preserved hill fort.Claireb 09/04/2019
Run over Yr EiflS4m49809/04/2019
CMC walkgreenways01/12/2018
Brilliant hill with the best hill fort ever, even in wind and rain. Space for one car just at junction to south for ROW .Mark Sims29/11/2018
Parked at 37894 44229 in a layby. Up the fp. There was low cloud and strong winds and I missed the right turn but it is there - a narrow path more or less paved with rocks. Wondeful summit area. The board at the bottom says that it is one of the best preserved hillforts in Britain and I would agree.clivevilla14/11/2018
beautiful daydeb.thompson20/10/2018
Revisit with Peterborough MC friends Lies, Melisa and Pawel, on a day when bigger hills rained off, round of the 3 Rivals from car park to SW. Impressed by the hillfort.RHW17/12/2017
With Trefor. A spectacular hill fort and well worth a visit. Visited after Yr Enlli north top and main summit. On to climb the Gyrn Ddu summits after.mike.hoult07/04/2017
Traverse from B4417-Tre'r Ceiri (outstanding hill fort)-Yr Eifl- Treforbenalder28417/10/2016
Second ascentPeteF25/09/2016
From Yr Eifl on good path. Large hill fort entered on NW side and exited at SW end. Lots of stones/rocks to plod over in very limited viz and high winds. Not the best of days, but not raining.jonglew20/08/2016
Continuation of walk from Yr Eifl. Took path east down to bwlch then trail up through fortifications to the summit - a very impressive site. To return, took path down south-west to rejoin my outward route. Solo.Man of Kernow111/06/2016
10/11 Lleyn Bagging day Tenth of eleven (Mynydd Anelog/Mynydd Rihw/Mynydd Cilian/Carneddol/Carn Fadryn/Garn Boduan/Carre Glefain/Yr Eifl North Top/Yr Eifl/Tre'r Ceiri/Mynydd Carnguwch)Fergalh21/05/2016
Porth-y-Nant upper car park at 353440 – East along a decent path & then NE up Llyn Coastal Path – After passing through kissing gate in wall, headed up through the ramparts to the summit of probably Britain’s best preserved Iron Age hill fort (the walls of over 150 stone huts are almost completely intact) – Continued to Yr Eifl. (JL)gerrybowes04/12/2015
Over from Eifl finding a path for some of the way up and not for other parts. Made a right mess of going back down to Trefor. There's a path marked on my map to the east of Eifl which doesn't seem to be there on the ground.Father Ted10/10/2015
With Hobbs family on birthday: car park at SH353440 - Bwlch yr Eifl - Yr Eifl N Top - Yr Eifl - Tre'r Ceiri - past Caergribin and back. Great walk and sea views. OK path between this and Yr Eifl. Fascinating ruined huts and walls on top. Did people live up here?Mark Jackson26/08/2015
On an evening walk from the summit of the B4417 roadalistairpooler24/08/2015
485mThe Grouse18/07/2015
Start ~ 366433. Climbed up to Caergribin and found a faint path that led directly to the summit. Fantastic views in all directions. Descended to the West and took in the hillfort on Tre'r Ceiri, well worth a visit. With Wombourne.steve hudson03/03/2015
As part of Llyn Coastal path tripmavero1005/06/2014
From Bwlch Nant Gwrtheyrn car park, by narrow paths through the heather. The hillfort is an impressive ancient site, much more so than tarted up 'visitor attractions' such as Caernarfon Castle and 95% of Hadrian's Wall.jim pererin23/04/2014
SH37438 44724Anton14/09/2013
From Llithfaen.mad max29/08/2013
Started out from car park on minor road from Lithfaen,..& took route alongside old wall to Caergribin outcrop,..then on up clear path to reach old hillfort site of Tre'r Ceiri. Grand views of the Lleyn,& Snowdonia from up there, Weather permitting...Set off due west for Yr Eifl after a good mooch around...Interesting place.beedeedee03/06/2013
Most recent ascent but ascended many times.smidgen26/03/2012
Tre'r Ceiri Iron Age Hill Fort - Yr Eifl - Point 444m in The Rivals Lleyn. Stayed at Porthmadog Travelodge (sale £12 per night). Dinner and talks with Keith Douglas and his wife Heather. This was the first time I had ever met Heather, and they have been married 42 years!JtwoUD08/02/2012
Parked near Llithfaen by the woods. Y Eifl North Top, Yr Eifl and Tre'r Ceiri. Got a bit lost coming off the top in fog and ended up scrambling over big boulder scree for quite some distance. Blowing a hooley but had a stop in the KISU - nice and cosy with Mark.Saggers26/11/2011
From large car park near end of minor road at SH 35289 44064. Yr Eifl N Top - Yr Eifl - Tre’r Ceiri. A fantastic half day hill walk.David Gradwell24/07/2011
Up from car park via Yr Eifl.Incredible hill fort.With Bridget and Oscar.catman02/01/2011
With Oscar and Catman.rosiebridge02/01/2011
With Bridget and Catman.oscarrosie02/01/2011
With Sue on a bracing day.Phreerunner15/11/2010
K Dropped off on the B4417 and followed FP to path junction SW of summit, then straight up to the hill fort remains. Then on to Yr Eifl.crazy27/08/2009
A circular walk, carrying Megs, from carpark at SH353440 incorporating the main peak and Tre'r Ceiri. The iron age stone hill fort is definately worth a visit. These hills are as good as many of the bigger hills in north Wales.Herbert Anchovy24/07/2009
From Trefor, scrambled along the coast to Nant Gwrtheryn then up to Tre'r Ceri and Yr Eifl.Jake99431/03/2005
From Trefor, including Bwlch yr Eifl and Yr EiflJamesD197209/02/2004