Tag Archives: Ogof

Ogof Draenen – through trip from Ogof Drws Cefn to Ogof Tarddiad Pwll Du – 23rd January 2025

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Huw Jones, Dai

By Dai MacDonald

It was a miserable morning but we’d arranged to meet up at midday as the rain was stopping, and we timed it well. With it being a through trip and us arriving in separate cars it made sense to leave a car at each end. I did have to remind Huw we’re leaving clean kit in his car where we’ll be coming out. We got the last bits of our caving kit and jumped into my car to leave it at our entrance end.

Kitted up and making our way along the old dram road, we headed to Ogof Drws Cefn.

I’d never been in the entrance before, I’ve heard horror stories of it stinking and full of flies, but that couldn’t have been further from the truth. Firstly it wasn’t stinking or full of rubbish, or full of flies, but Huw did confirm the flies were a thing. He told me about a trip Huw, Tom, and Dave had done through there in the summer and in the crawls they could hardly see from the flies.

I really enjoyed the entrance, however awkward and tight it is, it’s really nice sections of passage through there. I had no idea where we were going, and Huw’s memory was a little hazy, but it wasn’t too long before we were out and into “Wyvern Hall”. The straws and other pretty formations in there were stunning, and they seemed to be such a crisp white with minimal impurities.

Onward towards “Eliptic Passage” and “Fault Chambers”. When in “Fault Chambers” Huw asked if I’d been to the lower end, and I hadn’t, so we went for a look. This chamber is just amazing, it reaches up so high and dwarfs anybody on the opposite side of the chamber, just amazing!

Next up was “Perseverance”, which you would think would be enough, but for some reason Huw and I decided we’d have a look down a side passage, “Rabbit Run” which was a lot harder than a short section of “Perseverance”, but I’ve seen it now, much the same thought as “Beer Challenge”. The one thing that stood out in this first part of the trip was the bats, including two greater horseshoe bats, the second being in “The Nunnery”. There was a lot of bats, close to what you’d see in the entrance of Aggy.

“Megadrive” is such a massive passage, but also a gorgeously carved out passage, including some absolutely amazingly preserved mud banks. Just before going through “Indiana Highway” Huw said he hadn’t been to the big guano pile in a while, so we wandered over for a look, where I seen the last and final greater horseshoe bat. It’s so crazy to think that bats were using this exact spot about 2000 years ago, and up to roughly, 800 years ago. We were heading for “Lamb And Fox Chamber” after “Indiana Highway”, and when there it always strikes me how huge the boulders are in there, and some seem so precariously perched.

“White Arch Passage” passed quickly, but when we got to “Tea Junction” I got confused and really didn’t recognise where we were, to the point I asked Huw which way it was. He laughed and said I should recognise where I am, and then it all sank in, and Huw suggested following the passage all the way, rather than taking “Wonder Bra”, and once again I hadn’t done that before, so I was more than happy to, but once again, as I came out into ”Cairn Junction” I was completely disorientated and I didn’t realise where I was until I was more or less at the cairn. We paused for a moment, but both were keen to get to the surface now, we’d taken a lot longer than we expected, but luckily I’d added extra time to the callout.

Ogof Tarddiad Pwll Du is the newest entrance to be opened up and it’s got a lot less water than the original entrance, but you’re forced to be flat out crawling through short sections of it, so you end up a lot wetter. It didn’t really bother us until we were out of the cave and the icy wind started hitting us. The walk back wasn’t as bad as I remembered either, I thought the hills were a lot steeper. Finally making it back to the car we were both really cold now, my finger tips and toes were numb, and it wasn’t the best of evenings at Pwll Du, but we were done relatively quickly, apart from me getting tangled up in my T-shirt putting it on. We defrosted in Huw’s car for a couple of minutes before realising my phone was in my car near Ogof Drws Cefn. Once at the car and the callout stood down we went for a coffee at the closest McDonald’s.

It’s always such a great trip in Ogof Draenen with Huw Jones, it’s just nonstop exploration stories from when it was originally being explored, absolutely fascinating!

Ogof Draenen – Forever Changed newbie trip – Sunday 19th January 2025

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Group members – Gancho, Helen, Gareth, and Dai

By Dai MacDonald

I’ve not been caving an awful lot recently because of my work pattern, but this was the first trip of two into Ogof Draenen in a week.

As is tradition Gareth and I were late, but it was entirely my fault. I woke up late, and by late I mean roughly the time I was meant to be leaving and picking Gareth up. We’d arranged a 10am meet and we were roughly an hour late, but both Helen and Gancho were full of smiles on our arrival. There was dense fog covering everywhere, and you couldn’t see further than about 50 yards, but it wasn’t raining, and it wasn’t windy, so we made short work of getting kitted up and heading to the gate.

The entrance series was really dry, but what water there was, it was bloody freezing! Gareth rigged the climb to lifeline Gancho and Helen. While waiting I talked both through the best way to tackle it, and also reminisced the first time seeing it and how much it scared me, and now I’m talking and assisting others through it.

  • At the entrance before heading in
  • Head of the climb in the Entrance Series
  • 4m Entrance Series climb

The log book signed, we headed for “Wonder Bra” and then “Tea Junction”, not without me trying to take us the wrong way a couple of times first though.

  • Upstream Passage
  • Don’t look up! Too late!!
  • Tea Junction

From “Tea Junction” we were heading for “Gilwern Passage” and after the lengthy passage we stopped for a quick snack and drink before heading to “Galeria Garimpeiros”.

Gilwern Passage

We finally called it a day after we’d got to the junction for “Y Gwter Fawr”, “Sons Of The Pioneers”, and “Echo Inlet”, just at the end of ”Forever Changed”. Along the way Helen took a lot of photos as there’s lots of formations, and pretty passage along the way. We finished the inward journey with a photo at the junction.

Forever Changed and Echo Inlet

The journey outward went smoothly, with Gareth life lining Helen and Gancho on the climb again, and then one last photo as we exited.

Back at the entrance, happy after a great trip

For a change at Pwll Du it wasn’t bad at all, but it is Pwll Du after all, so it wasn’t pleasant either.

OFD, Cwm Dwr to Top Entrance – 26th February 2023

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Dai MacDonald – Author
Gareth Farr
Huw Jones
Pete Jones

The day started as a crisp morning, with the four of us meeting in a carpark in Dowlais. Pete was driving so we loaded his car up and headed for Penwyllt. It was only on the way to Penwyllt that Gareth realised how wet this trip was going to be. He’s not the biggest fan of cold water, and his excitement soon turned to dread. Arriving at SWCC Huw sorted the key, so we got changed and got going pretty quickly.

Cwm Dwr entrance is really close to SWCC, so we were slipping down the concrete pipe in no time, and I can see why Huw kept calling it the toilet. I was quite shocked at how steeply the entrance dropped after the entrance pipes.
There’s a short bit of walking passage before stooping, then crawling, and finally squeezing, and surprisingly, in Dim Dwr there was dwr!
Emerging out into a big passage once again, a lofty and long section of passage, I had to remind myself to stop and look up every so often as we clambered over the boulders.
Before long we met a stream, and then the choke. A notorious section for call outs after people getting lost in it, and it’s easy to see why. Within no time though Huw had led us through, and we made our way to the confluence.

The first section of streamway is pretty rocky before quickly turning to a fast moving streamway. This continues until you meet the Marble Showers. This really does show off the beauty of the rock in this cave. The dark limestone with the crisp white veins cutting through it, words, pictures, or even video just can’t do it justice.
Soon after this we were making our way up the main streamway, lots of high pitched noises were made by all of us initially. It starts similarly as a fast flowing stream, the difference is the pots! Some pots you can walk around the edges, some you can traverse over, but some you’re just getting wet! Still, it’s a treat, and privilege to be able to experience these places, and it’s a great laugh trying to navigate the pots.

Going into the great oxbow is where I noticed the stunning shapes carved out by water in the roof, twisting and turning in such a soft flowing shape.
Once again we were back into the streamway after climbing down from the great oxbow. The streamway definitely changes after this point, with sharper rocks, and more phreatic shelving, but soon it’s back to more phreatic passage. This is where we started looking for maypole inlet. It starts as a relatively easy climb out of the stream using a fixed steel foot plate, and this leads up a tall fixed ladder. At the top we were into a tight rift passage. As we made our way through this tight passage we were looking for a climb up through boulders.
Eventually we found ourselves up in the rift among huge boulders, Huw was sure it was the wrong spot, and after trying to traverse further he was positive. As time went on I started thinking the worst, that we’d have to turn around and head back out Cwm Dwr. While we were all saying we were looking for the way on, in reality we were just following Huw asking “are we going up, or down” repeatedly, while Huw was the only one looking.
Finally I heard unfamiliar voices and made my way back towards them, and asked “where have you guys just come from” and they pointed exactly where we had just come from among the huge boulders. I made my way back after telling the other it was back the way we’d just come from, and the head scratching began again.
Soon we realised we’d started too early and had to just go a little further along the passage, then the real heart pounding climb began!
I’m really not the most confident when it comes to heights, and this climb was definitely a real challenge for me, mentally more so than physically.
It started not too bad with some nice easy steps, more or less, to get you a few metres up in the rift before making a step around a corner onto a small rock wedged in the rift, which felt really exposed. This leads to a body height climb, roughly about 8-9 metres high in the rift, so once again it feels really exposed, especially as there’s not a lot of hand holds. Luckily Huw was first up and had a strap to hand, which he quickly attached to the rope already there, and I pulled myself up and out of maypole inlet using the strap. Gareth and Pete were quick behind me, and we emerged into a T junction. This was the point where Huw said, you should all know where you are now, so lead the way. I was absolutely clueless, but luckily after a bit of talking we were on our way to top entrance through salubrious, and the brickyard.

Emerging onto the hillside was nowhere near as bleak as we thought it would be, and it was actually quite a pleasant walk back down to the club house.
I really enjoyed this trip, and it got me pushing myself further than I thought I could again, as caving always seems to do. This also doubled up as a reconnaissance trip as Gareth and I would like to do the full through trip this year.

Ap Robert – 12th February 2023

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Trip: Ogof Ap Robert
Date: 12/02/2023
Cavers: Dai Macdonald, Gareth Farr.
Written by: Gareth Farr.

A caving trip had been planned earlier in the week for us to go on Sunday, every Sunday being our caving day and Ogof Ap Robert was our choice of cave for this week.
Sunday morning came around quickly enough, we were running a bit late as I had slept in, but eventually just after midday we got to Trefil Village. We parked up by the quarry gate and proceeded to get changed into our gear, while getting changed we were approached by a man who was curious as to where we were going today, he said he was keen to have a go at caving so we advised him to contact BCC and after he and Dai had exchanged details we left him to carry on with his day and made our way to the cave.
Just over an hour later and after looking at some interesting shakeholes along the way we arrived at the swallet in which Ogof Ap Robert is located. The swallet is situated up on the moorland between the disused Trefil quarry and Trefil village and proved to be quite a walk to get to, but we were here and eager to get in.

Ogof Ap Robert Shakehole
Ogof Ap Robert
Ogof Ap Robert Entrance


The entrance used is located just up on the right hand side of the cliff face, we donned our helmets and made our way in. As soon as we were in the cave it became apparent that the cave passages go down quite steeply, and quickly, with several small climbs down some boulders and boulder fill we reached the first boulder choke. After coming out of the choke we made our way down a few more small climbs to reach the second choke, at the end of the choke there’s a climb which begins with an awkward little manoeuvre through a small hole in the righthand side of the passage wall and leads down into another rift. We had brought rope and hangers with us as there is a hanger in place at the top of the climb to secure a hand line to to help you down and back up, but a hand line was already in place and after checking to see if it was safe to use we made our way feet first through the small hole and down into the rift below. Shortly after we then came to the third choke and the fourth choke, the fourth choke contains a scaffolded shaft that goes down and comes out pretty much at the beginning of Toad Hall, which is the biggest chamber in the cave.
Just before you enter Toad Hall, there’s an Aven that we climbed up which leads you out onto a boulder balcony that overlooks the big chamber, after taking a minute to take in the view we moved on by taking the passage to the right of the balcony, this took us over a small traverse and onto a climb down through a hole and the end of the small passage, after a couple of more small crawls we emerged back into Toad Hall.
We took a short stop for a drink and change of batteries then entered a hole in the floor which is found just to the left around some boulders as you enter Toad Hall. The hole took us under the boulder floor of Toad Hall, we were pre-warned by Huw Jones of BCC that the boulders are known to move under there and if we do go through there then we were to proceed with caution! I took a quick look and decided that it looked ok to move on, after a short careful crawl under the floor we encountered a small squeeze which I tried to go down, but couldn’t get through, then after a few seconds it dawned on me that the way through the squeeze was only a few inches to the left of where I’d first tried squeezing through, eventually we made it through and into a nice little passage which we followed until we reached Burma Road.
As we made our way along Burma Road we quickly noticed how different this part of the cave was compared to what we’ve just gone through, with all the sediment banks and muddy floors it was a lot different. The mud, as with any cave that has mud in it, did provide a little bit of entertainment, with the slips, wellies getting stuck and just generally getting muddy! We made our way along this tidy sized, muddy passage until we came to a few muddy crawls and a squeeze, shortly after which we came to the end of Burma Road, we had a bit of a chuckle at ourselves covered in mud, then decided to call it a day and made our way back out.
As we had plenty of time left on our call-out we decided that on our way back along Burma Road we’d have a look in the ‘land of Arawn’, this was also a muddy passage which we were able to stoop along for a short while until we reached a few muddy crawls, at the end of the crawls we came to an Aven which is the end of the passage, at which point we turned back around and got ourselves even more muddy crawling back out.
On our way out we had a short stop in Toad Hall to take some videos, with the videos finished we made the rest of the way out. As we left Toad Hall and entered the fourth choke the draft from the entrance was very strong, which surprised me as we didn’t notice it on the way in. While coming back out we again found ourselves amazed at how steeply and quickly this cave ascends/descends.
After a short while we emerged from the cave to the usual smells of life above ground, we stopped for a quick drink then made our way back down off the mountain, while stopping to take a look at the shakeholes that were on our path back down.
About an hour after exiting the cave we arrived at the car, got changed and after a quick cuppa and a bite to eat we contentedly made our way back home.
The trip was only a short caving trip, but it was a really good trip into a cave that we’d not been to before. Ogof Ap Robert proved to be quite a sporting cave with the climbs, crawls and squeezes, and as for the mud? Well… that was the icing on the cake for me!!!! Now onto planning the next adventure underground!

Happy Caver!

Craig a Ffynnon A Journey to the Promised Land 8th January 2023

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By Dave Trig Gledhill

It’s been a while since I’ve caved, nearly a year in fact due to work commitments but somewhat more committing than I wanted.
I called upon my good ole partner in caving crime, Tom Williams to assist me and mostly extract the urine out of my ability to move through a cave.
We decided CAF as we haven’t done it in a long time and it’s a relatively easy cave to move through (so I thought, maybe when was in our prime)
I’d forgotten how much the 2nd choke goes up (fun on the way out) how tight the initial squeeze is into Hurricane Highway hands and knees crawl (especially since I’ve been rather fond of takeaway vindaloo as of late) and how much a pig the oxbow is that comes out the stream towards the end of the cave.
Apart from that, a fantastic trip and great to catch up with Tom and many trips were planned.

Ogof Tarddiad Rhymney and other Trefil Quarry caves 7th August 2022

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Dai MacDonald
Gareth Farr
Chris Jones
Peter Lamb

The morning was fantastic, amazing weather, great company, getting into the great indoors, but all of this was abruptly forgotten as we got out of the car in Pontsticill and got to the hill we had to climb. There’s no easy way to Trefil, other than a long flat walk from Trefil village, but it takes us about double the time to walk from there, so we go straight up the mountain.


We had two objectives for the day, get Chris past the first boulder choke, and get some footage for a video.
We got kitted up at the cave entrance, for the first time we heard debris coming off of the cliff above the entrance, so stayed very cautious around the face.
The trip went really well, and we got some great footage of the cave. Chris got through the first boulder choke, and managed to make it part way through the “second choke” before becoming exhausted, and soon after Peter had reached his limit. Gareth and I pushed a little further, reaching the tight end series, but soon after stopped to save the others getting cold hanging around.


Back on the surface we made our way back out of the main quarry, had some lunch, and headed around towards Cwar Yr Hendre – Quarry cave 8. We have visited this cave before, but pushed for time, we had to leave. We spotted some red and white tape in there previously, so wanted to see what it was protecting. Unfortunately Gareth and I think a thin layer of roof may have peeled off and covered whatever was there. With everything looking very unstable we headed back out.
Last on the list is a cave which isn’t registered, as far as I could see, but I suspect it’ll fall into the Cwar Yr Hendre – sites 1-8, or 9+ if newer than the others, because it’s definitely been dug to join with another cave. High on the north face is where you come out, after entering through the opposite face to Cwar Yr Hendre – Quarry cave 8. Both caves were small, but still enjoyable.
After being cooked in my caving gear, or so it felt like anyway, I was happy to get it off and chill out in the last of the sunshine.

Will’s Hole 27th July 2022

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Gareth Farr
Dai MacDonald

Will’s hole is a relatively small cave with not an awful lot to see in the way of formations, but what it does have is a very simple pitch. Gareth and I have been learning basic SRT for a few months now, and have been keen to try it out underground. We know it’s a very busy spot along that river, so we had two mates, James and Steve come along and make sure nobody tampered with our ropes.
We all met at Gareth’s house for 5:30pm, and made our way to Dinas Rock. Gareth and I kitted up, and we all headed up river to wills hole. There were loads of people out climbing and bouldering, and a few interested in what we were up to.
It was about 7pm by the time we arrived at the cave entrance, and we didn’t hang around, straight in, down the 2m free climb and at the first rigging point, a railway track across the rift passage. Rigging was straightforward, I used my hand jammer as a lanyard to rig at the pitch head, and it worked well.
Once ready we wasted no time, I couldn’t, I’m way to nervous with heights, so I loaded up my descender, and sat into my harness, I was really nervous, but confident in mine, and Gareth’s ability, and I started the descent of our first SRT trip. We were both soon at the bottom without a hitch. We got our SRT kit of and headed to the right side passage. There isn’t much in the way of formations on this section, but there’s plenty of mud! Thick, silty, sticky, glutinous, mud that you have to crawl through. We came to a choke and couldn’t see a way on, so headed back to the pitch to look at the other passages. The main passage is nicely decorated at the high levels, along with a lot of flood debris, giving a good idea how high the water gets in there.
Before long we were at the end again and headed back out. Gareth went first, and both ascending without a problem, and de-rigging going just as well.
In what felt like no time at all, but it was actually about 2 hours, we were back on the surface with James and Steve chatting to some climbers.

Ogof Draenen – Sunday 20th March 2022

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David MacDonald, Gareth Farr, Louise Lucas

By David MacDonald


We met up on the not so bleak Pwll-du, the sun was beaming and the parking area was packed! Lou struggled to find us, but she got there in the end.


Gareth, Lou and myself kitted up and walked to the entrance. The entrance series was great and surprisingly easy to navigate, and before we knew it we were at the climb. None of us had a problem with it, well once Gareth and I transformed into human steps Lou didn’t have a problem. We signed the logbook at Cairn Junction and headed right towards Wonderbra. Once through Wonderbra we got to the “mud bank” and thought the left here was the left onto White Arch Passage, and carried on down the streamway.


Once we realised our mistake we turned around and headed back towards Tea Junction. We made good time through White Arch Passage, after a quick snack break at Tea Junction, and found our way into Lamb and Fox Chamber easily. We refilled our drinks at the cascade and then had another snack break at the cairn to Indiana Highway. Lou was feeling quite tired after the detour down and back up the streamway. Once we were ready to go again we were quite cold and tense. I don’t think this helped our nerves for the traverse. We climbed up the cairn and turned the corner into Indiana Highway, the mud bank was a challenge in itself! Once in the beginning of the passage we were all struck with its beauty, not that it’s decorated with formations, just the beautiful organic flow of the phreatic passage is enough! We quickly passed the side passages and round the tight corners to the start of the traverse.


I was first and headed into it around the first awkward corner to where it straightens out. I heard Gareth call and he was saying Lou was unsure about carrying on. We had a quick chat and decided amongst us we should just head back. On the way back we had a quick look at the side passages close to the start of Indiana Highway, we saw the fossil in the roof of the one chamber and couldn’t work out if we saw a shark tooth in the roof where you climb in/out of the side passage. On the way out we had no problems whatsoever and had a look in some side passages. We signed out on the logbook and headed back to the climb. We all had no problems climbing and route finding, and quickly found ourselves being soaked again on the final stretch. We got out and it was still a really nice day, so changing wasn’t too bad. We warmed up with a cuppa and headed on our way.

Ogof Craig A Ffynnon – Sunday 23rd January 2022

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Sam Jones, Pete Jones, Paul Chilcott, Adam Knapp, Huw Jones

By – Pete Jones

Photos – Huw Jones

On a cold Sunday morning we parked up in the layby next to the Blackrock quarry, Clydach Gorge. Huw, Adam, Sam, Paul and I, sorted ourselves out and made our way up to the entrance past the nineteenth century lime kilns.   John Parker and group of friends opened up the cave in 1976, looking for a back way into Agen Allwedd.  Unfortunately, they never did find the back door to Aggy but instead found approximately nine kilometres of spectacular caving.

  • Straw Chamber
  • Straw Chamber

Entering the cave through the metal gate, a strong draft is immediately noticeable.  We made our way along a low passage, to the first chamber, where we filled in the logbook. I was amazed how quickly we came upon well decorated formations, including one where the roof is covered with delicate straws.  Moving along the stream to the first boulder choke, the climb up begins using fixed ladders and scaffolding poles and if you’re quick you don’t get too wet from water cascading down.

  • Pete in the 1st Choke
  • Adam in the 1st Choke
  • Paul in Gasoline Alley

Exiting the choke, we followed the tapped path and made our way to Gasoline Alley. The water level in the long duck was very low, I don’t think Sam even got damp.  Coming to Northwest Inlet, the passageway looked inviting but the water looked cold.  We thought we’d save the cold clear water for later and instead turned right, crawling over flow stone towards the base of the climb up to the second boulder choke.  A fixed iron ladder takes you up the first section to a ledge where a guide rope and bolted steel plates help you up the next section.   To be on the safe side Huw rigged a safety rope to prevent any unwanted dramas.

  • Sam & Pete in the deep mud beyond the 2nd Choke
  • Travertine Passage

After the climb, the second boulder choke starts. It’s a gnarly but fun climb which snakes up through the choke.   It narrows at the top, before you emerge onto a slope which drops down into a muddy passage.  The mud is deep and sticky, it’s a welly boot trap. After pulling out lost wellies and a lot of laughter we made our way to a small flow stone rise which then drops to the start of Travertine Passage.

  • The Hall of the Mountain Kings

Travertine Passage is enormous and breath-taking. The calcite floored passage looks infinite and wonderful formations flank the route.  As you follow the taped path through the pools, there is almost too much to take in, there are formations wherever you look.  Eventually the passageway lowers, and the mud pools begin to reappear.  The passage way then increases in size as you approach the Hall of the Mountain King.  Its a massive chamber with fantastic formations.  Following the perimeter tape around the edge of the chamber, we made ourselves comfortable on the third boulder choke and had a cuppa.  Unfortunately, time was against us, and we turned around and headed back towards the exit.  The entrance to the second boulder choke looked narrower on the way back.  A feet first decent, with the help of gravity, was far less demanding than the ascent.  Now covered head to foot in mud the safety line, rigged up earlier by Huw, was very welcome.  Coming back to the entrance to the Northwest Inlet, the cold water no longer looked quite so inviting, and we decided to give it a miss this time.

Dropping back through the first boulder choke we made our way back to the entrance, from where we emerged covered in mud to a cloudy and cold afternoon.    It is a great cave and next time, I am looking forward to going beyond the Hall of the Mountain King to explore the Severn Tunnel and the Promised Land.

  • Outside the entrance before the trip
  • After!