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Name:Rhobell-y-big
Hill number:3400
Height:504m / 1654ft
Parent (Ma):2059  Rhobell Fawr
RHB Section:30D: Barmouth to Betws-y-Coed and Bala
Nuttall/Wainwright area:The Arenigs
County/UA:Gwynedd
Catchment:Mawddach
Class:Dodd (500-599m), Dewey
(Tu,5,Dew)
Grid ref:SH 78276 28262
Summit feature:N rocky outcrop
Drop:56m
Col:448m  SH783280  
OS map sheet(s):(1:50k) 124
(1:25k) OL23E
Survey:obvious summit
GPS data:show GPS entries for this hill

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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 89 users, only the latest 50 shown - Show all)ByDate of Ascent
From ruined building to NW, 7732 2888. Followed left (north) side of afon on dry ground then atv track to somewhere near the wall to NW of Rhobell-y-big. Very steep final ascent through deep heather to fine, rocky summit. On to Rhobell Ganol.Wycombe Wanderer08/10/2023
From Lllanfachreth car park. Nice path by school then rough ground to Cerniau West Top, Moel y Llan (also visited top of similar height), Cerniau (also visited top of similar height). Headed roughly NE contouring and then over to Rhobell Ganol and Rhobell-big and back to climb Rhobell Fawr and Cynefin Bryn Blew [Rhobell Fawr West Top], down ridge to rejoin outward route. Warm and sunny.RobertP26/05/2023
From Rhobell Ganol and returning via the bridleway to the Afon Mawddach bridge.Moorponder16/10/2022
https://www.strava.com/activities/7799936491Sleepwa1ker10/09/2022
Left the car at the end of the minor road north of Rhobell y big 78802 29243,and followed the ROW to east of summit and then the fun began mostly pathless over Rhobell y big, Rhobell Ganol, Rhobell fawr, Moel Cae'r defaid west & east top and Dduallt. A note of warning the return to the car after dropping off the last summit due north to ford the river, if this is in spate the crossing can be a difficult wide crossing with slippery stones, I got caught out and tried using the south bank to return, This is not advised instead it would probably be best to try and return through the forest near Foel Gron although this could be also be tricky. Nine and half miles in Seven and half hours(GPS suggested Five hours).WAYNE ROWLETT04/06/2022
Second visit to this Huw, this time from the north.Adrian230/05/2022
With Rhobell Ganol from Cwm yr Allt-Lwyd.Chris Peart14/09/2021
Parked at end of the road in Cwm yr Allt-Lwyd. A (rough and boggy) round of Rhobell-y-big, Rhobell Ganol, Dduallt and Ffridd yr Allt-llwyd.PGCE12/11/2020
3/4 Deweys from the end of the road in Cwm yr Allt-Lwyd at SH 788 292. Followed cart track easily past house and up to edge of moor, then across ridge which was tough going in the heather to Mynydd Bryn-llech, returned by edge of forest (slightly easier-ATV track) to cart track and then took a bee line to Ffridd yr Allt-Lwyd and back down to the car (all easy goingover this one). Then up south side of the valley, following indistinct track to where RoW crosses fence at SH 786 285 and on towards Rhobell Ganol, branching off before the marshy depression to go the splendid summit of Rhobell-y-big. Then sheep tracks across the depression and up to Rhobell Ganol. Finally back to the car using the indistinct RoW. (13km with 800m ascent in about 4h. (S)silveracorn_alan19/09/2020
Rhobell-y-big and Rhobell Ganol from Cwm yr Allt Lwyd with Rufus. Parked on grass on outside of sharp bend and followed the farm track E for 100m, vague atv track heads S to a stile roughly following ROW on map. Deep heather and bilberry lead to the striking summit of Rhobell-y-big. SE to slightly boggy ground but straightforward to Rhobell Ganol. Weather turned pretty nasty here so picked up sheep tracks under E face of Rhobell Ganol which lead easily back to the ROW. Will be back for the rest of the hills as it’s a great area.jacobrichmond04/08/2020
From Cwm yr Allt LwydJamesD197215/04/2019
Park at Cwm allt y lwyd bend 788282,Rhobell y big, Rhobell ganol, Rhobell Fawr, Rhobell fawr west top descend down faint path near wall east to plantation track, down track 600m 797249 then use ride which has easy path SE to to ride going SE to Moel Caer defaid west top, Craig y Benglog. then straight walk to Ddualt cross stream at 80702 25400 ground surprisingly dry. decent from Ddualt N fenceline to ford. Old posts and mesh scattered causing trip hazardunderhill17/11/2018
Parked at 788293 at the bend. Followed the track south then headed off through heather to the rocky summit. With CM. Headed to Ganol.bolton08/06/2018
With RH & PJRob Pen y Garn08/04/2018
7/7 (Carnedd lago/Cerniau/Moel Cors-y-Garnedd/Cynefin Bryn Blew(Rhobell Fawr West Top)/Rhobell Fawr/Rhobell Ganol/Rhobell-y-Big)Fergalh10/03/2018
Parked on hardstanding by track/road junction at 788292 (Space for 2-3 cars) – After ascent of Rhobell Ganol, returned to col & then made way up through the heather & between rocks to the summit. (S)gerrybowes29/04/2017
Exactly as David Gradwell --thanks for tip re forest.Crib Goch10/04/2017
From Llanfachreth taking row, track and path to Rhobell Fawr after diversion to Cerniau, then descended and climbed Rhobell Ganol. From there it was over rough wet ground to Rhobell-y-big before dropping down to Afon Ceirw which was crossed at the wall which neatly took that out of play. The forest tracks to outward route.SS26/12/2016
Parked at SH 78833 29236, which is on a track just off a road. Space for three/four cars. Took track on right of track and followed uphill. Track gradually peters out leaving moorland walking to wall. Wall backed by wire fence with barbed wire on top. There is a stile. Over stile and continue towards Rhobell-y-big eventually crossing a stream. Lot of heather and bilberry bashing and at the top a bit of scrambling. Summit obvious. Descended same way.MikeM25/08/2016
Included in Nuttall route.David Gradwell24/08/2016
Nuttall Walk WN 6.3 Dduallt and Rhobell Fawr from the road end in Cwm yr Allt-lwyd (787293), also visiting Rhobell Ganol and Rhobell-y-big on the way down. 13.7km with 870m ascent in 5h30m. (S)silveracorn_alan14/05/2016
Quick thrash up through pathless heather at end of big walkMark Sims25/03/2016
From Cwm-Hasgen a round of Rhobell-y-big, Rhobell Ganol, Rhobell Fawr, Moel Cae'r-defaid West Top, Craig y Benglog, Dduallt and Ffridd yr Allt-llwyd.rhalstead22/11/2015
With Steve and Frank on a bright but chilly day. nuttall route 6.3 with a few minor tops added. All the Arenig Nuttalls now summitted.Lou27/09/2015
With Steve and Lindsay on a fine day visiting Dduallt, Rhobell Fawr, Rhobell Fawr West Top, Rhobell Ganol and Rhobell-y-big.knarf27/09/2015
Superb circular from Cwm yr Allt Lwyd across rough terrain with the heather in full bloom.Neolith30/08/2015
Nuttall walk 6.3: Dduallt - Rhobell Fawr - Cynefin Bryn Blew - Rhobell Ganol - Rhobell y bigronaldo33326/04/2015
Continuation of walk from Craig y Dinas. From lane-end walked a few metres east on track, then south on grassy track which zig-zagged up the hill over pasture to a ladder stile. Once over stile, crossed a stream and up through and bilberry, around crags and up to fine summit. A splendid hill. Walk continued to Rhobell Ganol.Man of Kernow124/08/2014
3400 and 3390 together. Parked as others to NE. Good path then gets worse after about half way to 3400 - a fine hill - approach seems less rocky from the SW. Some bog to 3390 but not too bad. Tried to find the path to NE so that I could follow it S to 2 other Deweys but the path is a fiction. Spent a good half hour trying to find it in heather and bog. Have 1:50 map on GPS and was standing on the 'path' up to ankles in bog. Clear weather no path anywhere. Nightmare. Gave up and returned to car.destaylor27/03/2014
Galltywenallt22/02/2014
Parked to north west and climbed as part of circular route with two other Deweys.chriswatson07/05/2013
Extended version of Nuttalls' route, with Ruth. Cwm yr Allt-lwyd - Ffridd yr Allt-lwyd - Dduallt - Rhobell Fawr - Rhobell Ganol - Rhobell-y-big - Cwm yr Allt-lwyddavidpettit8406/05/2013
From Rhobell Fawr, Rhobell Ganol. The best top of the day really as there are a couple of gullies you can scramble up.clivevilla25/10/2012
Start ~ 788293. followed a track then open moor to Rhobell-y-big. A fine, rocky summit, with Wombourne.steve hudson24/02/2009
Smashing rocky summit. Approached from south but a pretty boggy in plces. From here to Duallt was a nightmare of bog and inpenetrable forest with the footpaths marked on map non existent on the ground.Father Ted13/09/2008
visited on way back to car parked by the mawddach, part of a walk which took in dduallt and rhobell fawr.stig_nest15/08/2007
Meirionydd Dewey bagging, walk 1/3; Bryn-pig, Moel y Feidiog, Mynydd Bryn-llech, Craig Dolfudr N Top, Craig Dolfudr, Ffridd yr Allt-lwyd, Rhobell Ganol, Rhobell-y-big (brilliant). RHW26/12/1997
Solo ascent. What a great little summit, rocky and interesting.thenomad26/06/1997
A wonderful rough solo 4hour run circuit of Rhobell Fawr and Ddualt and Deweys 500m tops- form south having dropped L off at Chester for a lacrosse match and collected her later then up to Kendal.Chris Pearson05/10/1996
Ascended on the way to Rhobell Fawr.JohnW29/10/1985
TREBORK11/02/2023
beckybags26/03/2022
IainT23/01/2022
softsquare17/09/2020
Nick Canute08/08/2020
A Peckish18/04/2019
chalky195305/09/2018
dadofmorph20/04/2018
willias02/12/2017
boxblade22/04/2017