Hill number:2145
Height:678.5m / 2226ft
SMC/RHB Section:30F: Dolgellau to Machynlleth
Nuttall/Wainwright area:Cadair Idris
Topographical area:WN10 Aran-idris
Class:Marilyn, Hump, Simm, Hewitt, Nuttall,
Clem, Trail 100
Grid ref:SH 81732 15037
Summit feature:ground 2m E of cairn
Col:360.4m  SH802170  
OS map sheet(s):(1:50k) 124 125
(1:25k) OL23E
Observations:ground 45m SW at SH 81700 15006 is about as high
Survey:Leica NA730/Leica RX1250/Trimble GeoXH 6000
Survey of Maesglase.pdf
Comments:Former Marilyn, Hewitt and Nuttall summit is hill 2146
Change log:show changes for this hill entry
GPS data:show GPS entries for this hill


Show Map

View on: Geograph  Magic  NLS

Show/hide GPS File for mountains/markers shown

Show/hide GPX File for mountains shown

Hill summit photo
(where available)
Hill portrait photo
(where available)

Click on a photo link to view photo on the hillsummits website

To contribute a summit or portrait photo for a hill
please contact the hillsummits website

N.B. Some hill summits are on private property or on land where there is no public right of way.  Permission should be sought from the landowner where access to a hill summit is through private land.
Please report via the contact page any logs you see below which describe or encourage acts of trespass.  Please quote the hill number and hill name.

Logged Descriptions  (logged by 482 users, only the latest 50 shown - Show all)ByDate of Ascent
Plane spotters when we arrived. Plane spotters still there when we left five plus hours later. Watch they donít hem you in at the car park! Hot day. Worked our way via path and fences, up and down. Great views into different valleys and one low flying plane! With GMelizyanne26/06/2024
Nuttall 10.3. Used the small parking area on the road bend just above the Mountain Centre beyond Aberilefenni. Further parking area about 1km along forest road after the LH fork before a forest gate on the Nuttall route. Initial path ascending through the clearcut faint - but starts by a fire notice. Once above the 2nd forest road, path is well established through the remaining woods to the ridge. Thereafter Mynydd Ceiswyn - Waun-oer - Cribin Fawr - Craig Portas - Craig Portas E Top - Maesglase - Maen Du - (back to Craig Portas) - Mynydd Dolgoed W Top. On the steep descent back into Cwm Ratgoed there is a newish bwf to cross to enter the access land woods and mapped ROW seems none existent. Instead half way down by a rotten stile aim NW to the corner of the woods by a ruin and a gate out into a grass field. Cross the grass W to pick up the ROW on the track. Very enjoyable walk with good views and an impressive grass ridge traverse between Craig Portas and Maesglase. Solo.richard6906/06/2024
Ascent dinas mawddry through wood. Followed rough oath that contoured to meet cambria way. Followed fence line up to summit. Descended north then east along footpath to a470. With mcwWoolly Hattie03/03/2024
Out and Back from Dinas Mawddwy, Maesglase (old GR) / Maen Du - Maesglase - Craig Portas - Cribin Fawr - Waun-oer. With R+R.Dan Baddeley11/11/2023
Last one of the day, a bot of a boggy walk across the grassy moorland with a few bogs to get through, rewarded with another great view of most of the ranges around, carried onto Maes Du and came straight down towards the road to complete a circular route.Buckleymon01/09/2023
From the high point of the A470. A horseshoe route and return with the three Simms.Peterb28/07/2023
9.8 miles 3086ft walk ,start at A470 viewpoint carpark. to Cribin Fawr, Waun-oer, Craig Portas, Maesglase and Maen Du.stephenbuda02/07/2023
A pleasant enough clockwise round of the fells above Aberllefenni made a little more exciting by my having difficulty in finding a clear route into Cwm Ratgoed.oldbagger2717/06/2023
From mapped roadside parking area to NNE (SH 8021 1702). Good track leads up to Cribin Fawr first, then a divert across to Waun-oer before getting back on track to Craig Portas, its E Top and then across to here. On to Maen Du before a steep descent.jonglew16/10/2022
Barry's final Welsh Marilyn, with large group, whisky and cake. Small cairn on levelish grassy summit. Grey but dry, with clear views. We descended NW over steep grass to ascend Ochr y Bwlch after visiting E summit.Denise 16/10/2022
Fine October day and excellent company to join up with for Barry's Welsh Marilyns completion.Twice Shy16/10/2022
As Jonglew for Barry last welsh Marilyn. Party of 12. Started at carpark at head of pass finished by decending to east were a car was used to transport back to start.cjo16/10/2022
Barry's Welsh Marilyn completion.davechaffey16/10/2022
East to west traverse of Maesglase, Cribin Fawr and Waun-Oersturuss27/08/2022
Foel Dinas, Maesglase - Maen Du, Maesglase, Craig Portas East Top, Craig Portas, Cribin Fawr, Waun-oer, Mynydd Ceiswyn, Gau Graig, Mynydd Gwerngraig, Mynydd Moel, Cadair Idriskeithouk23/08/2022
5/8 Mynydd Ceiswyn, Waun-oer, Cribin Fawr, Craig Portas East Top, Maesglase, Maen Du, Craig Portas West Top, Mynydd Dolgoed. Fantastic Route from the Ratgoed Valley with nice walk out at the end. Hot day indeednickywood113/07/2022
From Bwlch Oerddrws. Waun-oer, Mynydd Ceiswyn, Cribin Fawr, Craig Portas, Craig Rhiw-erch, Maen Du and Foel Dinas.Gwastadros11/07/2022
Anticlockwise circuit of the main hills within Maesglase Maquaco-line including out to Waun-Oer HuMP summit only 8 metres less than this summit that makes it Maesglase aDromedary Marilynvegibagger16/06/2022
Along fence from Craig Portas. Continued to old summit of Maen Du.Minto30/05/2022
From Dinas Mawddwy, from a lay-by on the A470,steep initial ascent through the forest on a good track with steps, then open hillside crossing awkward ground to Bwlch Siglen. Steep ascent to the left of falls to the escarpment. Past the Devil's Point and followed the rim of steep cliffs all the way to Maen Du. Made short diversion eastwards to Craig Rhiw-erch (true summit), marked by very small cairn. Returned bu North East spur from Maen Du, track marked on map, non existent, extremely steep grassy slopes down to a bwlch before MoelCwm yr Eglwys, skirted this to the right on a good track all the way down to Ty'n -y-celyn and the A470, about 3km roadside verge walking back to the car. 5 hours total time, overcast but good visibility, didn't see a single other person on the hill.Marksalop15/04/2022
From the layby on the A470 SH 839 162 along the RoW to the S (somewhat obtructed by fallen trees) through the farm, and onto the permissive path towards the access land (signed). Up the track then path marked on the 1:25K OS up the S flank of Moel Cwm yr Eglwys the path which, once beyond the bwlch is there but fairly indistinct on the ground. Small cairn (near to) the top. Returned direct down the nose of Maen Du down the fence line (very steep). Met the farmer with three hand reared lambs on return.sebastiencale14/04/2022
From car park at top of pass, followed path over Cribin Fwar, then dogleg out to Waun-oer, back to stile below Cribin Fawr, followed path and fence line to Craig Portas then onto Maesgkase. Decent over Maen Du down NE ridge, then PROW to A470. Where 2nd car parked.7.6miles, 3hr 40 walking, 2348ft ascent. Really pleasant walk with added excitement of some snow showers.JulieB04/01/2022
South from car park on A470 at top of pass. Found a good path west of crags, in Scotland I would have called it a stalkers' path, all the way up to the wall, much shorter than the path to the east and easy going. Then along the wall over Cribin Fawr to Waun-oer, back a short way to drop easily down to forest track, followed to end and then an easy line back up to fence, Craig Portas and Maen Du. Dropped down to Penintag Uchaf and back on road. Afternoon pleasant walk along the fences to Pen y Brynfforchog.dickscroop11/11/2021
Parked at milkstand and walked 500m back along A470 to Ty'n-y-celyn and tracks to Maen Du and summit. Returned by Craig Maesglase to admire cwm and waterfall.lordtonult19/09/2021
Corris Roundhaydnw31/07/2021
Afternoon hike with my brother and his 3 children in >25° heat. Climbing from car park at Ochr y Bwlch to Cribin Fawr (659m), then making a dog-leg to Waun-oer (670m), before following horse-shoe ridge round to Maen Du (674m) on Maesglase. Descended to Dolobran. ~11Km with 790m ascent.VirtualMountain17/07/2021
Maesglase & Maen Du - Dyfi Hills. Parked on A470 large lay-by at SH 82643 16350 at Pont Buarth-Glas. SE over rickety fence onto hillside and followed the W side of the stream cutting through the LHS of Craig Buarth-Glas, extremely steep requiring lots of pulling on vegetation, collapsing ledges and loose rock, exciting. Up to fence and Moel cwm yr Eglwys then ridge and path to Maen Du and fence to Maesglase summit. Descended NW spur of Maen Du to around 450m then steeply down bracken and grass to cross Nant y Cae at 270m and easy pastures to gate onto A470 just W of lay-by. A really impressive mountain, tough from the north with sustained slopes of 45 degrees.jacobrichmond22/11/2020
from A470 to east, up beautiful cwm to Bwlch Siglen and along cliff tops to Maen Du, then west to main summit and down via steep NE ridge of Maen Du.IanHHill11/10/2020
From A470 high point car park. Cribin Fawr, Waun-oer, Craig Portas, Craig Portas East Top, Maesglase & Maesglase B&L.CJM29/09/2020
From Ochr y Bwlch via Cribin Fawr. Cloud down and misty but dry. My final UK 2000ft Marilyn, 749. Just Isle of Man to go.N.Morters28/09/2020
Parked on the minor road opposite the one leading up to Ty'n-y-braich and climbed up the Bwlch Siglen for the experience of the clifftop walk to the summit. Followed fence SE from summit back to the forest and down to the car. Not the shortest route but enjoyable.NormanW11/09/2020
Nuttall walk 10.3Clive G30/08/2020
Third top of three following Nuttalls twelve mile route from Aberllefenni. Route took in Waun-oer, Cribin Fawr and Maesglase.WAYNE ROWLETT29/02/2020
Aberllefenni > Cwm Ratgoed > Mynydd Ceiswyn > Waun-oer > Cribin Fawr > Craig Portas > Maesglase > Craig Portas > Mynydd Dolgoed > Ratgoed Hall > Aberllefenni.Winterfloodian17/09/2019
From the east, parking on minor road NE of Tyn y Celyn, then marked path directly to summit. Local symbols show this as an access path but it passes directly between TC and its garden. A barking dog alerted a local resident who was pleasant enough and said it was up to me, but advised me to go another way as the way forward was very steep and not advised by national park. Any other route would have been much longer so I pointed out the access sign and continued. A grassy track led up to 400m but then became little more than an animal track, but the only seriously steep ground, near the top, was bypassed.Topographer5727/08/2019
From Craig Portas, fine grassy hill, rain had stopped. A long day of following fence lines! Decided to descend via the waterfall.DanMaisieBex03/08/2019
This was our second attempt at this summit. Last year we followed the Nuttalls Walk, nice and easy up and through a shady forest. Then we emerged into the hot sun. Water supplies got low by the second summit and I became light headed ... dehydration, so we headed downhill. So this time where to park for a shorter walk. Decided on a lay-by on the A470, Not show on OS maps, but 2km NW from Dinas Mawddwy . Lay by seemed part of old road, under trees and very little used. OS 849 164. Track directly from lay by. But little used with fallen trees and the map was cluttered and hard to follow. Didnít seem to be a good starting point. Eventually we were heading SW up the valley and followed the path. In hind shift it might have been better to continue west to the fence and walk along that. Eventually we got to the summit - Craig Rhiw - Erch. Then back to Maen Du, over the stile and follow a twisty path steeply down. (OS maps phone app very useful confirming we were going in the rMalcvolm01/06/2019
Via Bwlch Siglen and Craig Measglase, a spectacular route. Very steep descent from Mean Du.Susan Bidwell30/04/2019
From A470, up by bwlch seglen and Craig Measglase to summit and back to Mean Du for very steep descent to Tyn y Celyn. A spectacular route.Lionel Bidwell30/04/2019
Cribin Fawr Far North - East Top > Cribin Fawr North - East Top > Cribin Fawr > Craig Portas (Mynydd Dolgoed) > Craig Portas East Top (Mynydd Gartheiniog) > Maesglase South Top > Maesglase (old GR) - Maen Du > Moel Cwm yr Eglwys from GR: SH 81913 16372Hippster16/02/2019
Cribin Fawr Far North - East Top > Cribin Fawr North - East Top > Cribin Fawr > Craig Portas (Mynydd Dolgoed) > Craig Portas East Top (Mynydd Gartheiniog) > Maesglase South Top > Maesglase (old GR) - Maen Du > Moel Cwm yr Eglwys from GR: SH 81913 16372ronaldo33316/02/2019
Solo. From lay-by on A470 near Dinas Mawddy ( approx GR 857149). Steeply up through forest then long contour to Bwlch Siglan. Up path running parallel to edge of forest then around escarpment to Maen Du. On to flat summit of Maesglas. Descended following fence SE then rejoined outward route. Great weather. Poor paths and slow walking . Took longer than expected.mike.hoult22/10/2018
#649 A470, Cribin Fawr, Craig Portas, Maesglase, Maen Du, Bwlch Siglen, Foel Dinas, Dinas-Mawddwy.tim74727/09/2018
P on handy grass verge at approx 830152. Good track to start - main height gain on very overgrown path - then ok incipient path in moorland. Visited Maesglase first, then Maen Du - good views down to A470.ger26/09/2018
Parked at Bwlch Oerddrws - Cloddfa Gwanas - Waen-oer then followed the grassy ridge fences to Maesglase (a grassy giant). Impressive and quiet. Returned retracing our steps. Coffee and bara-brith at Cross Foxes as a treat at the end.briandavies25/09/2018
Up from CP/lay-by at SH 826 164 via Moel Cwm yr Eglwys and old summit. Wanted to confirm summit with belt-and braces as the re-location not in the diary. It was in my RHB, though.Eddie23/08/2018
Ian and gangkenthompson13/05/2018
Ascent via Craig Maesglase from layby on A470. Good views and pleasant walk.The Playful Pig28/04/2018