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| Name: | Twyn Brynbychan |
| Hill number: | 15641 |
| Height: | 411m / 1348ft |
| Parent (Ma): | 2237 Fan Fawr |
| RHB Section: | 32C: Neath to Chepstow |
| County/UA: | Merthyr Tydfil, Rhondda Cynon Taff |
| Catchment: | Taff |
| Class: | Tump (400-499m) (Tu,4) |
| Grid ref: | ST 06324 98921 |
| Summit feature: | ground 1m N of trig point |
| Drop: | 45m |
| Col: | 366m ST062995  |
| OS map sheet(s): | (1:50k) 170 (1:25k) 166E |
| Change log: | show changes for this hill entry |
| GPS data: | show GPS entries for this hill |
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 27 users) | By | Date of Ascent |
| Train form Quakers Yard to Merthyr then back along the ridge. Mynydd Aberdar, Mynydd Gethin & Twyn Brynbychan. | Arbie | 07/06/2021 |
| Run out and back from Abercynon to Mynydd Gethin | milejunkie | 27/03/2021 |
| from mt ash car park up past kennels and forest track to twyn brynbychan then on to ridge to mynydd gethin then to mynydd aberdar return forest track to caegarw 19 klms 5 hrs | underhill | 24/05/2020 |
| Asked and was given willing permission to park at the kennels. Freed a daft sheep who had got wedged between two cattle feeders in an attempt to get to it's tiny lamb. All it needed was to discover it had a reverse gear. Steep climb up through forest. Good viewpoint. | Campbell Singer | 03/04/2018 |
| Parked at kennels. Nobody to ask but I saw the lady when I came down and she was friendly. Up the track through the farm and just kept taking the upward option and then rightwards.1.88 miles 45mins. | clivevilla | 14/03/2018 |
| Arrived at Mountain Ash by train. Didn't choose the most sensible way up as I wen't NE up past the cemetary and onto the adjacent hill as it was tricky to cross the ravine. Eventually got to a col then headed south and down through the woods to the trig point. After also visiting a nearby tricky geocache I came down a more sensible route and ended up by the cattery and then down to the station. | Father Ted | 16/12/2017 |
| I walked over this hill when I led a walk for the South Wales LDWA Group. | morgs4mountains | 22/10/2017 |
| Parked at cattery with owner's permission. Steep farm track before traversing up through conifers then out onto open hillside. | jonglew | 09/12/2016 |
| Parked below Kennels, up on BW and then forest tracks to top. trig not surrounded by trees at the moment with good views to BB's in one direction and England in the other. Brambles prevented any short cuts on MTB tracks. My last Merthyr top. | PeterD | 31/07/2016 |
| Parked in A4059 lay by. Walked along indistinct footpath, forest road and mountain bike track. Nice coffee from van though on return | Ramblingpaul | 07/10/2015 |
| Run along Barret Traverse | PGT1975 | 30/01/2015 |
| 2/7 park near Kennels (after asking permission as it is private car park) than head up steep track to top take right and head for mast and trig pillar | Fergalh | 08/01/2015 |
| Run along Barret Traverse | PGT1975 | 28/09/2014 |
| ST06323 98919 | Anton | 01/09/2012 |
| Estimate | fosbury2005 | 01/06/2012 |
| trig pillar some of the forestry has been cleared but still no views when i was their | hodder | 29/08/2007 |
| trig near mast compound, OK view albeit gappy. from 045992, park below kennels, RoW then path follows pylons to join track near summit | RHW | 17/03/2006 |
| Alex C | 22/06/2018 | |
| ngthack | 25/07/2017 | |
| Adrian | 29/04/2017 | |
| asbown | 25/10/2016 | |
| MM | 25/03/2016 | |
| TREBORK | 16/03/2016 | |
| Dusty | 21/01/2010 | |
| Twice Brewed | 03/02/2007 | |
| Tony J | 25/02/2006 | |
| andrew.allum | 01/01/2000 |