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Name:Mynydd Allt-y-grug
Hill number:2282
Height:338m / 1109ft
RHB Section:32B: Carmarthen to Vale of Neath
County/UA:Neath Port Talbot (CoU)
Catchment:Tawe
Class:Marilyn, Hump, Tump (300-399m)
(Ma,Hu,Tu,3)
Grid ref:SN 75097 07932
Summit feature:no feature
Drop:190m
Col:148m  SN758102  
OS map sheet(s):(1:50k) 160
(1:25k) 165
Survey:Abney level
Comments:Alternative summit 338m at SN753081
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, and mention the hill number and hill name.

Logged Descriptions  (logged by 132 users, only the latest 50 shown - Show all)ByDate of Ascent
From SN 742073 - one tiny parking place. Along path and forest track to SN 749081, then zig-zagged up rough pathless NW flank to grassy final incline to the topIsbjorn14/11/2018
From the SW on path starting at road bend from Penydarren. An unmarked track branches slightly right up towards a barbed fence, scaled at its HP.Topographer5729/09/2018
Parked just beyond path. Out onto open hillside where much felling has taken place and from track junction headed upwards over fence and up to twin topped summit. Area with lots of ATV tracks and ponies. SW top was slightly higher.PeterD10/06/2018
From minor road to SW. Better to drive past start of track on bend and park in much larger area just further on. Starting N on wet forest path, when clear fell area reached went SE on logging vehicle tracks to fence, then NE alongside this, steeply at first. At high point, track heads east, then fades, but easy to SW summit, and then NE once. Returned to track at fence, but followed the track W to bend, then down a bike trail. Do they really ride down there? Mad!Minto11/04/2018
A nice enough walk from the small car park E of Penydarren. Along the footpath to join a logging road, then R at a junction onto an unmapped track that curves up and round to the fence at the top of the forestry. Hop over the fence at the high point, and wander up the hill. Good views.Gill22/02/2018
From bough point on road to the north muddy before the gate. Through the very muddy farm yard and up through open one woodland on to plateau to the twin topsvegibagger02/01/2018
7/8M parked at gates sw along road then up path through woods track to wall then up to tops.robertphillips10/11/2017
With: hb; Parked at SN762081. Followed steep Ln up then path from 762081. Heavily overgrown with bramble and juniper but we subdued it. Path much easier from Penlan Fach to summit. Land-rover driving on top. Returned by easier route from farm.Ian Baines19/08/2017
We parked at the side of a residential street at SN762082 and walked up the steep, narrow road above to get onto the hillside. We had intended to take the footpath heading south west at SN762085, but that is totally overgrown, so continued up the road to make a sharp zigzag through a beautiful oak wood to reach Penlan fach. We made our way out onto open access land and found that there were loads of 4x4 tracks which were very helpful in reaching the summit. We did both 338m spot heights just to be sure. There were also loads of blaeberries up there. Lovely hill with great views, but one to do in summer. It would be incredibly wet and muddy in the winter. With Keith and wee Ross.islamidget17/07/2017
Parked 764086. Walked down the road, through houses, turned left up hill and found footpath through farm, green gate in the woods leading to main road, straight walk left down road and up on to quad bike tracks. Great views from the top.Hippy7711/02/2017
Took lane to woods above Cilmaengwyn Uchaf. Path into the trees is not gated so no issue with blocking access. A tad muddy but soon dried out as the climb started..then into a clear fell quagmire. An unmarked track leads to an old wall junction at 746077- It's ruddy muddy but a good short cut. Over 1 b/wire fence and up rough steep grass passing some nicely weathered outcrops. Summit yields some lovely views.stig_nest14/12/2016
Used the parking and route described by SteveSmith and it worked very well. The last bit of the footpath before exiting the woods was pretty boggy and rutted but apart from that all was well. Continued S along the ridge after the summit before dropping down into the forest again and picking up a good track. A nice hill.Father Ted09/11/2016
Best of 7 Marylins climbed today from Penydarren forest track. Steep climb to the top, on mountain bike track past abandoned car. Nice views to Brecon Beacons.twg2727/06/2016
Via penlan Fach farmstead again made this a tougher walk than it needed be walked along a footpath via the edge of the woods which was very boggy visited both summit and alternative summithodder02/06/2016
An A to Z needed to find the start- Bryn-y-grug (just above the telephone box- top of housing estate). Good little walk, out by Gilfach-yr-haidd road, back via Penlan-fach. The two heathery tops- I included Tarren y Gigfran- were pleasant and made easy by the many 4WD tracks, though it would be miserable if the petrolheads were in action on the hill. Wildness trying to reclaim the hill in a pair of nesting Ravens. Huge snow showers around, but sunshine here and high Brecon Beacons clear of cloud. My 3rd Ma of the day.pwheeler26/04/2016
Parked on grassy area away from field entrance just past footpath (SN 7422407366). Walked back along road turning right on fp following into woods as it becomes a wide forest track. Stayed with track passing summit to the south then looping back approaching summit area along unmarked track from the NE. Summit area fairly flat but high point marked by a small pile of stones next to a broken flat stone. Continued over summit picking up another quad bike track that led to a gap in wall and onto a track descending to the initial track and back to the car.SteveSmith14/04/2016
Parked to SW where track meets road- one car space- and followed forest tracks to open land, then across hillside to the top. Shortcut return through forest proved a poor choice due to inpenetrable brambles, best stick to the tracks!Cas-gwent15/03/2016
From nr road end to SW. Parking for one car at gate, more just down the road. Up the path to join a road end, immediately to right another path heads directly up the hill away from you. Took this and followed to forest edge and newish fence. Heather burned away by fire. Couple of tops either side of teh GR top visited. Best of the day.nordicstar20/02/2016
Very wet through the woods. Found a very useful trail heading off main track at high point.jenx20/02/2016
Space for a car or two at SN 734073. Then walked a 70 yards or so back down the road and took the waymarked track through the forest. At circa SN 743077 a path leads diagonally uphill where a fence needs to be crossed. Steep final push to summit. Returned via same route.bowlesy10/10/2015
3/6 Walked up through forest track until reached large circle in path took steepest path which led to final ridge. Poured rain at top so saw nothingFergalh01/08/2015
Parked at Ystalyfera and after battling around the farm we eventually located a track to the summit. Easy descending as we followed the edge of the trees to the gravel road. 85 minutes with GB.bolton28/07/2015
Parked at junction of minor roads in Ystalyfera at SN76280 08543 Up to end of road & then up waymarked path through woods to track Followed track to farm at 759085 & then through gate & up path to edge of forest Along edge of forest & then along track up NE ridge to summit & alternative summit. (PM)gerrybowes28/07/2015
Drove up Penywern Road to start of footpath heading west.Room to park. Followed footpaths to Ty Gwyn, Pant-y-gwanyd, and Penlan-fach. Followed footpaths around east side of woods then west into woods. Headed south where path turns to right and onto open hillside. Tracks lead to the summit. Easier way down following ridge NE then alongside woods to regain outward route. 2 spot heights on map with same height so did both.mike.hoult18/07/2015
Allt y Crug, Mynydd Uchaf East Point, Mynydd Uchaf, Cefn Gwrhyd and Cefnllan as round walk from Ynysmeudyunderhill12/07/2015
Parking at 7421007360, to ROW into woods as far as the forest road, then rising track slightly north of east (not on 25K) which joins the fence reaches open ground at 7466307750. then on to summit.tim74708/07/2015
From Cilmaengwyn, followed minor road, forest path then open hill.rhalstead06/04/2015
From a parking spot south east of Penydarren SN 742073. Woodland path, hairpin right to a hole in the fence at SN 74600760. Tracks and paths then to the highest point.G4OBK (Phil)23/01/2015
From cafe and car park to NE. Dont go to south end of hill to find way in, go to north side.dicky31/05/2014
Parking at stone quarry near Cefn Gwrhyd tump. Difficult to follow paths as map and ground do not correspond. Whole summit area seems to be a 4x4 playgound, none here today. Clear summit point.jonglew26/04/2014
Parked in Ystalyfera and followed tracks to corner of wood, then 4x4 tracks to summit.Lionel Bidwell25/04/2014
Suggest you don't approach from South West. Lots of brambles and gorse, and no real paths. Stunning views all round though.huwthomas18/04/2014
Hill destroyed by 4x4 off road vehicles.Dusty30/03/2014
Cycled up 1:4 from Ystalyfera, path then trods to the summit.Eddie09/07/2013
From Cwn Du to the sw. There is an estate which is tricky to find your way through. I parked by the last estate house and walked up the road and forestry path (boggy). I kept going past (forking right a couple of times) the hill and came out north of it wclivevilla16/11/2011
Easy from Ystalyfera to NE on footpaths and dirt tracks on a lovely summer morning.Dugswell202/07/2011
Very hard to navigate/park amongst all the lanes to the southeast. The forest road approaching from the north looks simpler.nddavies01/06/2010
Start 9:30 at 743073.No access notices so followe FP to end of ridge and up out of sight of farm. Tracks and signs of earth-moving on top. No TP. 2 tops at far end seemed same height. Back same route to car 10:55. Weather fair. dbb26/03/2010
From SW up track which becomes big track, followed until roughly opposite summit. Then steep ascent through bush, bilberry and heather.Aye Jimmy04/05/2009
Not a stroll. From SW follow forest track/stream. (There is a smaller better path immediately to the left of the mattress.) Top 300m very hard - heather blue berries steep.destaylor08/09/2008
Just a pleasant Billberry top - no stones or posts. Approach from SN 743071 NOT recommended - a real struggle uphill through bracken etc. Tried woods back but ended surrounded by brambles and scrub - my worst experience on a Marilyn!signyred18/07/2006
approach from Ystalyfera.Adrian16/04/2006
petey19/08/2004
Galltywenallt09/11/2002
One of 5 marilyns in a day We parked up in Ystaleyfera and up a path to the woods - we followed the ridge and reached the top.ChinnockC12/04/2002
7 marilyn day with Darren. The narrow alleys have a lot of detail(buildings etc) to cram int a small space on the map which makes finding the start of f'paths tricky.Chris Pearson23/04/2000
Sign pointed into distance, across field with bullocks to clamber steeply up on deep heather. A very long mile over deep virgin heather. No birds and occasional 1' high fir trees. Domey top - no cairn.arranc03/05/1999
OK summit & view. from road @ 743072, cross damp pasture, steep pull then fp thru heather to summit RHW20/12/1998
Crumblie220/10/2018
geralddavison04/05/2018