Name:Diffwys
Hill number:2058
Height:750.4m / 2462ft
Parent (Ma):2056  Y Llethr
SMC/RHB Section:30D: Barmouth to Betws-y-Coed and Bala
Nuttall/Wainwright area:The Rhinogs
County/UA:Gwynedd
Topographical area:WN09 Llethr-rhinog
Catchment:Mawddach, Catchment Boundaries
Class:Hump, Simm, Hewitt, Nuttall, Submarilyn,
Buxton & Lewis, Bridge, Clem
(Hu,Tu,Sim,Hew,N,sMa,BL,Bg,Cm)
Grid ref:SH 66131 23417
Summit feature:ground 5m N of trig point
Drop:147.6m
Col:602.8m  SH 66613 24396  
OS map sheet(s):(1:50k) 124
(1:25k) OL18W
Observations:ground is 0.08m higher than base of trig point
Survey:Leica NA730/Leica GS15/Trimble GeoXH 6000
Survey of Diffwys.pdf
Change log:show changes for this hill entry
GPS data:show GPS entries for this hill

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Logged Descriptions  (logged by 484 users, only the latest 50 shown - Show all)ByDate of Ascent
From road end to SSW, up the Braich to west top and path up to trig.PeterD25/04/2024
Day two of Dragons Back Raceemily05/09/2023
Rhinogydd south to north: with Hannah, James, Housechild & Vicky.Grinner20/08/2023
Dragons back recceemily06/08/2023
18.4 miles 4201ft walk, start at Ganllwyd NT carpark to Rhinog Fach and Y Llethr, Crib-Y-Rhiw and Diffwys.stephenbuda08/07/2023
5th Mountain today, blessed with great views on this fantastic hike in the Rhinogs.Buckleymon20/06/2023
Sarah Nuttalls & Cambrian Way Day 17Rob Rees23/05/2023
From the East sidegingerreader09/04/2023
From end of minor road north west of BontdduJamesD197227/03/2023
Fourth of 8 tops on a breathtaking but exhausting 16.5 mile trek from Dyffryn Ardudwy to Barmouth via Moelfre, Y Llethr, Diffwys and the southern Rhinogydd ridge. After Crib-y-Rhiw, carried on along the ridge, taking in the outcrops on the top of the ridge that the main path seems to cut away from. This proved to be a terrific viewpoint of Y Garn, and an excellent place to rest aching feet for 30 minutes before the steep pull up to the summit. The summit was very windy, contrasting with most of the rest of the walk. A terrific summit. Onwards to the West Top on very easy slopes.thesweetcheat13/09/2022
Started walk from Parc Isaf campsite where we were staying and joined Nuttall walk 9.1 at the south. Completed the walk as per 9.1 then returned to campsite. Long tough walk with R took, 11.5 hours in total.Dan Baddeley27/08/2022
Mynnyd Egryn South Top, Mynydd Egryn, Craig y Grut, Diffwys West Top, Diffwys, Crib-y-rhiw, Y Llethr, Rhinog Fach, Rhinog Fawrkeithouk25/08/2022
Started from the end of the minor road leading to Nantcol where a £3 fee is payable to the farmer. A Eleven mile route taking in Rhinog Fawr, Rhinog Fach, Y Llethr, Crib y rhiw, Diffwys and its west top, the first four miles is very tough taking us about four hours but once over Y Llethr it becomes easier with grass slopes and finishing in Eight hours total.WAYNE ROWLETT14/05/2022
With JackW & RobN. CW loop of the Rhinogs. From farmer's CP in Cwm Nantcol at SH634262.masmith02/08/2021
With MS and JW. Via Foel Ddu, Rhinog Fawr, Rhinog Fach, Y Llethr, Diffwys. Clear weather, great views, long day.robertgn02/08/2021
From Barmouth to Tal Y BontDanmawr02/07/2021
From parking area at end of Llechfraith road. Old track to Harlech towards ridge, then more direct. Diffwys West top, Diffwys, then back down ridge to Barmouth taking in tops on the way. With B and R.jenx28/05/2021
easy path up from Diffwys west which is the route we did. a hard to reach top from Cwm nantcolAristotle Chip18/05/2021
With Kim & Rufus in deep powder snow. Parked at the parking area at the road end in Cwm Mynach - off the A496. Followed the Forest track N then turned off left along a minor path a few hundred metres before Llyn Cwm Mynach. Followed path up through woodland then up through the old manganese mine works with increasingly deep powder snow to the ridge. Followed the ridge south through deep snow to a moonlit summit at around 7am. Returned same way.jacobrichmond04/12/2020
from Cwm Nantcol via Llyn Hywel, Rhinog Fach and Y LlethyrIanHHill09/10/2020
Overcast ascent from wild camp at Llyn Hywell of Rhinog Fach (712m), followed by ascent of Y Llethr (756m) with cloud base now above the peak. Followed ridge southwards to Crib-y-rhiw (681m), Diffwys (750m), and Diffwys West Top (643m) in growing sunshine but continuing strong cold winds. Descended north to Pont-Scethin, a climb over the saddle between Moelfre Y Llethr, and down into Cwm Nantcol. Another pathless ascent to the col between Foel Ddu and Rhinog Fawr before final descent via Gloyw Lyn to Cwm Bychan. 20Km, 993m ascent, 1393m descent.VirtualMountain19/09/2020
GMmaryjdavies10/09/2020
Last summit of the day. A revisit after coming here last year but clearly didn't log it. I could have dropped down earlier but was enjoying the views. Part of 26 mile route from Ganllwyd. Y Garn - Rhinog Fach - Y Llethr - Diffwysmeltdiceburg30/07/2020
CMC walkgreenways07/09/2019
Cil-cychwyn > col > Y Llethyr > Crib-y-rhiw > Diffwys> Diffwys (West Top) > Llyn Bodlyn > col > Moelfre > col > Cil-cychwyn.Winterfloodian25/07/2019
A mid-week walk in the Rhinogs.Claireb 10/07/2019
21.4 miles, 3887ft Cambriam Way Walk.stephenbuda21/06/2019
DB Race day 2milejunkie20/05/2019
park nantcol, craig llyn hywel, rginog fach, y llethr, crib y rhiwm diffwys point 688, diffwys, diffwys, diffwys west top down to llyn bodlyn, moelfre then back to nantcolunderhill13/05/2019
Talybont station - Moelfre - Y Llethr - Rhinog Fach - Y Llethr - Crib-y-rhiw - Diffwys - Diffwys W Top - Craig y Grut - Mynydd Egryn - Mynydd Egryn S Top - Garn - bunkhouse between Garn & Ffridd GorllwynMark Jackson17/04/2019
Dragon's Back reccedc9621/03/2019
doneoutlawcatcher10/10/2018
South Rhinogs from Cil-cychwyn farm (Cwm Nantcol). Walk to Lyn Hywel then climbed Y Leithr, Crib-y-rhiw, Diffwys West Top and Diffwys. On return included Moelfre (Marylin & Dewey).knarf25/09/2018
With RobLynfa Penygarn29/04/2018
With LynfaRob Pen y Garn29/04/2018
on way to Llethyrgbeniston25/03/2018
Approached from the East- Mynnyd Cwm Mynach- rough ground- and then descended SW along the full length of the ridge to Barmouth on good paths. Got free bus T3 from Barmouth to Bont Ddu. HP is by slate trig- on east side of wall ( stile). Dry but no views as in cloud. Small snow patches by walls. Second ascent.Denise 17/02/2018
5/7 (Craig y Lyn Hywel/Rhinog Fach/Y Leither/Crib-y-Rhiw/Diffyws/Diffwys West Top/Craig y Grut (Lawlech)Fergalh16/09/2017
Miserable start through drizzle from Tal-y-Bont but sheltered in the woods. Brightened up by the time we got onto the tops. Fantastic views from Diffwys for our lunch stop. With Mark, Hamish and Huey.Saggers09/07/2017
Rhinog Fawr, Rhinog Fach, Y Llethr, Crib-y-rhiw, Diffws, Diffws West Top. Followed route in Nuttall's book. Couldn't find anyone at the farm so I left £2 parking fee in the porch. Weather had closed in by the end and it was a long day, made the mistake of following the bridleway at GR634240 on the map instead of getting The Nuttalls book out of my rucksack! Should have turned off at GR 640242 and headed for the gate at GR637246.tsharp07/06/2017
Dragon's Backhaydnw23/05/2017
from hidden valley.very heavy rain sleet atthe top very windycavey16/04/2017
Parked up at the end of the tarmac lane from Bontddu. We walked back down a bit then up Cwm Llechen and joined the miners path up to the top, then all along the ridge as far as Mynydd Egryn then back to the car. 17.5km in stunning sunshine and didn't see anyone!Neolith07/04/2017
Start at end of minor road off A496 in Cwm Mynach SH 683 219 via Crib-y-Rhiw and Y Llethr, then on to Diffwys West Top.Westdenewalker14/10/2016
Nuttall Walk WN 9.1 Rhinog Fach & Rhinog Fawr from Cwm Nantcol. Visiting Rhinog Fawr, Rhinog Fach, Y Llethr, Crib-y rhiw, Diffwys and Diffwys West Top. 18.5km with 1470m ascent in 8 hours. (S)silveracorn_alan03/10/2016
Parked on grass verge by minor road in Cwm Nantcol at SH 62904 25783. Followed path over col then track down to footbridge over outflow of Llyn Bodlyn reservoir at SH 64617 23816. Then Diffwys West Top > Diffwys > Diffwys NE Top > Crib-y-rhiw > Y LLethr. From summit of Y Llethr returned to stile at SH 66047 25556 then followed path mostly beside wall back to col.David Gradwell21/08/2016
Hit as part of a route from Trawsfynydd to Llanelltyd over Moel Ysgyfarnogo, Rhing Fawr, Rhing Fach, Y Llethyr, Diffwys and Y Garn. Two days, wild camped on east shore of Llyn Hywelandrew.morel28/07/2016
Approached by the narrow minor road from Bontdu to the south which ends at natural car park at Banc y Fran. Good path all the way to summit. Very hot. Stupendous views. Probably the best I've ever had in Wales. Needed plenty of liquid.Campbell Singer18/07/2016
Nuttall walk on a sunny dayRuth14/05/2016
13.5 mile circular ridge walk from the car park east of Cors y Gedol Hall, walked up to the grassy dome of Moelfre then along the low ridge to Y Llethr, bagged Crib-y-Rhiw and onto Diffwys, then carried on along to Diffwys West Top, Craig y Grut and out and back to Mynydd Egyrn, followed bridleway back to the car park, a very pleasant walk with great views, good paths and not too much rough terrain.DanTrig26/09/2015