| Name: | Bwlch Mawr |
| Hill number: | 1953 |
| Height: | 510.3m / 1674ft |
| Parent (Ma): | 1952 Gyrn Ddu |
| County/UA: | Gwynedd |
| Topographical area: | WN01 Hebog-anelog |
| SMC/RHB section: | 30A: Anglesey and the Lleyn Peninsula |
| Catchment: | Minor Rivers only (South) |
| Class: | Hump, Dodd (500-599m), Dewey, Submarilyn, Clem (Hu,Tu,5,Dew,sMa,Cm) |
| Grid ref: | SH 42673 47851 |
| Summit feature: | large boulder 12m ESE of trig point |
| Drop: | 147.6m |
| Col: | 362.7m SH 4143 4664  |
| OS map sheet(s): | (1:50k) 115 123 (1:25k) 254 |
| Observations: | rock outcrop 135m SSW at SH 42643 47721 is 0.35m lower |
| Survey: | Leica NA730/Leica GS15/Trimble GeoXH 6000 A Performance Evaluation Trimble GeoXH6000 vs Leica Viva GS15.pdf |
| Change log: | show changes for this hill entry |
| 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 160 users, only the latest 50 shown - Show all) | By | Date of Ascent |
| KJF Ascended using FP from E heading for Gyrn Ddu first, before calling at Bwlch Mawr on the way back which is probably the least stony approach - using one of the ladder stiles W of the summit just N of the wall junction. Fine view across vale to Snowdonia though low cloud interfering while at the summit. Views improved through the day so we got clear views on the way down. | crazy | 02/07/2024 |
| First in a 4 hour circuit of this top, Gyrn Ddu and Gyrn Goch starting and finishing from Clynnog Fawr. Only met 2 people in all that time, despite wonderful walking conditions, cool, dry and sunny. | desperate dan | 20/04/2024 |
| From Llanaelhaearn, fine dry stone walling, excellent summit, well worth it. | richardrosser | 08/09/2023 |
| From Pen-y-Gaer, following an ATV track for a bit, over a few walls. Descended W to top of path by wood, then down interestingly across steep slopes through the trees, via Cwmgwared. | Minto | 16/07/2023 |
| A fine circuit of five hills from the A499 at Gyrn Goch. Summited this one with Jill & Minto. Gyrn Goch / Gyrn Ddu / Moel Bronmiod / Pen-y-Gaer / Bwlch Mawr. Lovely path down through the woods to Cwmgwared. | Dangerous Dave | 16/07/2023 |
| From the mast on the east side. At my age the walls were a bit difficult to negotiate and the fence lower down. Met a Dutch couple on top and now they know what a Dewey is!Solo. | bolton | 24/06/2023 |
| easy park to east near mast started on row path not where map shows, stile over wall 100m west of summit of Bwlch Mawr then Gyrn Ddu and Gyrn Coch return east using row some big stone walls however plenty of breaks no need to climb | underhill | 29/12/2022 |
| From Trefor for a round of Gyrn Ddu, Bwlch Mawr and Yr Eifl. | rhalstead | 29/12/2022 |
| Bwlch Mawr , Gyrn Goch and Gyrn Ddu about 3 hrs 30 from parking near mast to east . Always wanted to walk these hills, but the clag was down and it was blowing a gale. Their rocky tops were quite forboding with little visibilty . And route finding a bit tricky. Must go back again in decent weather. | Mark Sims | 11/11/2022 |
| From street parking in Clynnog Fawr using ROW to reach open hill side, after reaching Bwlch Mawr I crossed the stile near the summit and followed a path by the wall around the valley head not losing to much height all the way to Gyrn Ddu retracing my steps back to the start. Just under Seven mile in Four hours twenty. | WAYNE ROWLETT | 20/08/2022 |
| 510m | The Grouse | 27/12/2021 |
| Parked in a big layby along the road just past Pen-sarn.A very rainy day! Used the footpath all the way up, very straight forward. The summit is further back than you can see. You have to go over a wall if you want to visit the trig point. The views are probably good on a clear day. | Skarletk | 02/10/2021 |
| A circular walk visiting Gyrn Ddu, Gyrn Goch & Bwlch Mawr, from the small parking area at SH 397 452. Returning via the footpath to the south. A splendid summit as commented on by others. Good stile over the big wall about 300m north of the summit. 12km with 550m ascent in 3h30m. (S) | silveracorn_alan | 17/09/2020 |
| From transmitter mast. | PGCE | 18/08/2020 |
| Gyrn Ddu > Bwlch Mawr [S7437] from GR: SH 43727 47789 | ronaldo333 | 11/07/2020 |
| Gyrn Ddu > Bwlch Mawr [S7437] from GR: SH 43727 47789 | Hippster | 11/07/2020 |
| With Gareth from the Clynnog Fawr Road to the East of the hill. Gyrn Ddu first then Bwlch Mawr (and its handsome trig) on the way back. | briandavies | 19/03/2020 |
| https://www.strava.com/activities/4195048902 | Sleepwa1ker | 15/09/2019 |
| HP is blocky rock outcrop near trig; cairn S of wall is lower. Approached via muddy RoW (path) from Clynnog Fawr with interesting 7th C well and St Beunos Church. Superb sunny views of coast ,sea and wild sheep pastures | Denise | 08/04/2018 |
| From Clynnog Fawr by the wet and muddy bridle way then rough grass of hillside. Excellent views from summit. | RichardM | 08/04/2018 |
| Up and down from the radio mast. Anxious twenty minutes as dropped car key before half way up. Kept going though. Such is this bagging obsession. Found it. | Eddie | 10/01/2018 |
| Me Alf and Darryl. | jrj | 27/10/2017 |
| From Gyrn Goch on a CW circuit of 6 hills, on to Pen y Gaer. Parked at entrance to Ynys Ddu farm (SH 3971 4523). Nice top. | jonglew | 08/09/2017 |
| Anticlockwise route over 5 tops of the group. A very fine summit. Very rough going. | stig_nest | 20/07/2017 |
| From road to East by transmitter, en-route to Gryn Ddu | tim747 | 07/06/2017 |
| With Trefor. From Aerial to the east. Straight to summit. On to Gyrn Ddu after.Back via public footpath to the south. Great views and good weather. | mike.hoult | 07/04/2017 |
| From mast at 437478 and W on Llyn Coast Path (not very clear to begin with), heading to top after first wall. Crossed wall stile in the corner to access the trig. Then on to Pen y Gaer. | milimana | 02/03/2017 |
| 4/4 Last of four on misty day (Foel/Mynydd Cennin/Moel Brnmoid/Bwlch Mawr) | Fergalh | 22/01/2017 |
| Parked in Llanaelhaearen and climbed Gyrn Du first before coming over to this one. Came down off Gyrn Du the way I had gone up so had a long contour round till I picked up the track. All OK till you hit the mother of all stone walls near the peak. Hope they won some competitions for this one. | Father Ted | 08/10/2016 |
| Parked just below mast 435478 at good space then followed ROW until it dropped slightly. Interesting direct line over rocky bluffs, went to false summit then scaled the wall to visit trig pt and ascend extra 35 cm to claim hill. We walked down W by the wall and found a wall stile- little easier than climbing the wall, and returned using the path to the mast. So clear we could make out Preseli, Wicklow, Mourne and IOM. With Pete | pwheeler | 20/09/2016 |
| A difficult 3hrs walk with Christopher H in cloud over the 3 tops of the Gyrn Ddu group. The bridleway from Clynnog Fawr past Pen-yr-allt-uchaf was severely overgrown. Easier once on the fell, though no path. Wall near summit must be climbed. Easy going following wall S to ROW. | Mark Jackson | 24/08/2016 |
| Parked at end of farm track for Llethr-ddu then followed row to Fron-heulog. Straight ascent to Gryn Ddu with slippery boulder hopping at end. Descended east then north and up Gyrn Goch then back and round by walls to Bwlch Mawr (best 'stile' is 100m to west). Returned by row but diverted to take in Moel Bronmiod cutting down directly to Llthr-ddu on descent. | SS | 07/08/2016 |
| Circuit including Gyrn Ddu and Gyrn Goch. Started at 438475. Followed path W in thick mist, GPS came in very handy as strayed from the path many times. Summit very rocky, fine views especially towards sea. | JamesD1972 | 18/07/2016 |
| A direct ascent from the mast at SH437478 bagging Bwlch Mawr,Gryn Ddu and Gyrn Goch. | mad max | 12/07/2016 |
| Parked at end of farm track at SN39710 45239 (Room for 3 cars) - Up farm track & path to deserted houses on waymarked track - Gyrn Ddu - E. down to col & waymarked track - N. alongside wall to rocky summit (JL) | gerrybowes | 03/07/2015 |
| With Jenx on the Marilyn circuit. Fine hill this. | nordicstar | 24/06/2015 |
| from E at mast 435478 and on to Gyrn Ddu in mist and rain | Thearlaichdubh | 20/06/2015 |
| On a circuit from Clynnog Fawr with Sue, on a fine day. | Phreerunner | 20/11/2014 |
| petey | 16/11/2014 | |
| Start ~ 405487.Used Row alongside the Afon Hen to gain the hillside before following the walls up to the summit of Gyrn Goch, a somewhat sporting ascent. Moved on to Gyrn Ddu and then walls and paths to Bwlch Mawr. All the summits are rocky with great views, took a direct descent to follow forest edge to meet outward route. With Wombourne. | steve hudson | 21/04/2014 |
| Parked at GR 405487, room for several cars on section of old road. Took path alongside stream through wood eventually out onto open hillside. Climbed extremely steep grass hillside by wall to Gyrn Goch then on to Gyrn Ddu. Continued to Bwlch Mawr. Excellent views. Descended to edge of forest eventually joining outward route back to car. With SH. | wombourne | 21/04/2014 |
| A direct ascent from the mast at SH437478. | Chris Peart | 19/01/2014 |
| Pant Glas to llanaelhaearn. Slow going bouldery terrain. | Smudge | 30/11/2013 |
| KeithByTheC | 20/09/2013 | |
| Survey/walk with Mountain Views team. Roadside parking for 2 or 3 cars at SH437475. | webmaster | 31/08/2013 |
| joint survey with MountainViews | Galltywenallt | 31/08/2013 |
| From SH 437 477. | summitsup | 18/07/2013 |
| Bwlch Mawr, Gyrn Ddu and Gyrn Goch. Parked on A499 and ascended via the forest. Tough ascent of Bwlch Mawr with no path. | clivevilla | 15/02/2013 |
| With Mora, from minor road to East | BLACKHILL | 15/02/2013 |
| Pleasant day out visiting Lleyn HuMP's and trigs. | Alex C | 12/02/2013 |