Many thanks to the following, who have provided sponsorship to the 2018 expedition via money, equipment, support or words of encouragement:
The 2018 expedition is now only 4 weeks away. A few red tape problems have now been resolved and everything is set, including last minute equipment orders, turning over the shed looking for old equipment and herding everyone into position.
The latest edition of Descent (No 263 – Aug/Sep 2018) includes an article on Tresviso exploration, giving an overview of the recent work by the team, and is well worth seeking out a copy. Available from 4th August.
- 1st September to 15th September 2018 – main expedition dates
The expedition has a number of goals. The following are a few primary objectives:
Cueva del Nacimiento
- Jurassic World – Terror Firma – multiple avens and climbs,
- Pina Colada Bypass – a 3-10m rift leads off from the Pina Colada sump.
- Joe’s Crack – un-descended shaft behind Death Race camp.
- Teeth of Satan – Wet Aven – +30m aven with draft and calcite squeeze, requires enlarging.
- Dan’s Big Room – unexplored section of maze in area of Dan’s Big Room and Winter Gardens
- Parting Friends – a dive of the Parting Friends sump is planned.
Cueva de la Marniosa
- Beyond Sump 2 – a dive of sump 2 and exploration beyond is planned
Pico Boro (SUSS)
SUSS are also involved and will take on responsibility for exploring either Flowerpot on the Pico Boro area.
- FlowerPot – re-rigging and exploration of leads
- Surface sweep and logging of entrances in Sara Depression (around camp)
- Surface sweep and logging of entrances in Pico Boro area
Time and resources permitting there are a number of secondary objectives that will be attempted:
A large mine and natural cave complex in the Minas de Mazarrasa area. Pozo del Castillo series was explored to -292m depth in 1983, with either a howling draft or roaring waterfall beyond a constriction at the limit. The potential of the cave is significant but currently a collapse prevents getting to the end. Pozo Natacha series ends at -309m depth and is close to the same point in Castillo.
- Pozo Del Castillo – shoring and bypass of rock collapse Castillo remains a major lead, if we can get past the blockage!
- Pozo del Castillo – other entrances. FT16 entrance snow plug would appear to be the same blockage in lower Castillo passage. Snow plugs are reported further into the cave, so another entrance must exist!
- Pozo del Castillo – surveying of Natacha upper series and locating possible surface entrance,
- Pozo del Castillo – Natacha 1983 series. Attempt to get small, skinny person through current limit, otherwise derig and survey.
Valdelafuente / Sobra Valley
- Re-locate draughting surface entrance on Valdelafuente, close to 80m aven beyond Sump 1 in Cueva del Marniosa,
- T20 (Sobra Valley) – sandstone sink above Hall of the Mountain King in Cueva del Marniosa,
- Yorkshire Inlet in Cueva del Marniosa. Exploration of col above aven (also close to T20),
- Upstream series in Cueva del Marniosa. Large black voids above the streamway, if leads head to the South this is up the Valdelafuente
Sierra del a Corta
Above the furthest reaches in Nacimiento is the Sierra del Corta. A heavily wooded area with a number of promising leads, that could potentially drop into Nacimiento and provide an easier route into the back-end to aid exploration at the far reaches.
- T554 – large 100m shaft on the Sierra del a Corta, this requires some digging at the bottom,
- Al2 – a drafting shaft not yet bottomed. Jurassic World in Nacimiento appears to be heading directly towards this site,
- T294 Oh What Pot (La Gobia) – continuing passage,
- Surface prospecting close to vicinity of Terror Firma in Nacimiento. Terror Firma is only 40m vertically and 200m horizontally from some parts of the surface in the Sierra del a Corta region.
- Locate and survey General This may be another way into T87 Mazarrasa, bypassing entrance collapse. (most likely T88 Suerte or T89. T88 draughts strongly at junction inside)
- Locate and descend FT43, this draughts strongly. It is almost directly above Boulder Chamber in T87 Mazarrasa and would provide bypass to collapse at T87 entrance.
- Surveying of Nacimiento top entrance series. There are a number of unsurveyed and minor leads in the area,
- Prospecting on Hoyo Oscuro and Hoyo Evangalista. Highest entrances on the mountain range.
- Mine 2.32a – there is large unexplored level (with tram lines) leading to unexplored passage.
Cueva del Nacimiento – Jurassic World – Terror Firma
The ‘final’ aven at the end of the cave was climbed to over 40m, a split in the aven was followed to a new height of 534m above the entrance, but closed down. The second aven remains unclimbed and is ongoing
Cueva del Nacimiento – Jurassic World – Pterodactyl Crumble
Another aven at the end of the cave was explored upwards before reaching horizontal passage for another 60m, then finally closing down.
Cueva del Nacimiento – Death Race 2000 – Joe’s Crack
Initial constriction was passed and the passage continues down another 35m, to head of undescended 12m pitch. The passage heads under the Death Race chamber, toward the Death Race pitches.
Cueva del Nacimiento – Teeth of Satan – Wet Aven
The Wet Aven was not attempted on this trip, in part due to 2 trips getting lost on the way to the far end and running out of time to climb.
Cueva del Nacimiento – Other
180m of passage found near Death Race passage.
A new aven (+30m) found near P Chamber in Death Race passage, continues.
Cueva del La Marniosa
Sump 1 was dived and the 80m aven beyond was climbed to approx. 47m. The rock is extremely poor and no obvious continuations could be seen at the top of the aven, using powerful lights.
The Marniosa team diverted attention to trying to dive Sump 2, an undived sump, discovered in 1987 and unvisited since. A rather ambitious trip saw two cavers reach sump 2 and allowed one diver to pass sump 2 (30m long t 5m depth) to surface in stream passages. A further 40m of cave was explored and still continues, before safety concerns forced a retreat.
Pozo Del Castillo.
Pozo Castillo continues to be surveyed (2km +) and leads explored, attempting to bypass the 1987 snow collapse. The rediscovery of FT16 and the lower snow levels, allowed further progress in the system, but a sump was encountered at -110m.
Pozo Natacha (a series of pitches in Castillo, rather than a separate cave) was pushed past it’s 1983 limit, down a tight right to the head of a tight 20m pitch. This pitch head would need serious enlargement before further exploration can continue.
Torca del Carneros was (re)discovered and surveyed. This lies on La Mesa, above Tresviso, and probably would be connected to caves draining away from Tresviso toward the San Esteban valley.
Fallen Bear was also rigged ready for further exploration in 2018. The bulk of the cave is a steeply descending ramp, similar to Nacimiento, and contains a number of leads of potential.
In total over 2km of cave was surveyed in 2017. Exploration of Nacimiento continues and has now pushed the height to over 534m from the entrance. A logistical challenge that is not proving to get any easier, despite fixed camps toward the end of the cave. Trips to the far end require 4-5 nights of camping, and advanced camps at the far (far) end now need to be considered. Passing the second sump in Marniosa is a major achievement and unexpectedly has surfaced in passage heading away from Nacimiento and into the mountain, possible towards a hypotheses trunk route that may also feed the upstream sump in Nacimiento. The rigging of Fallen Bear, and discovery of some new leads, opens up further possibilities of closer deeper systems lying between Nacimiento and the deep potholes high on the mountain.
More details to follow but a quick taster
Cueva del Nacimiento – new height reached at back end of cave
Fallen Bear – new leads discovered
Torca de la Carneros – possible leads on hill above Tresviso
Cueva de la Marniosa – Sump 2 (previously undived) passed last night…
Oh and Pozo Castillo – still collapsed
I first visited the Eastern Massif (or Andara) region of the Picos de Europa in 1996, as part of a small Lancaster University Speleological Society (LUSS) expedition. LUSS’s heyday had long since waned, but a very small contingent of students (and ex-students) were keeping the club going during term time and trying desperately to kick start the Tresviso expeditions in the summer.
The last large scale LUSS expedition had occurred in 1987, but since that time the majority of LUSS cavers had moved onto bigger and greater things, so due to lack of information and resources, these 90’s expeditions concentrated on smaller scale objectives, without the manpower or time to embark on anything of the size of the 70’s and 80’s LUSS expedition (where 50+ cavers descended on the mountain for up to 3 months!).
For me, relatively new to caving, an expedition of any size was a grand undertaken and I would bore anyone who would listen about the great adventures I was sure to have, and the dangers I was sure to face. The reality was slightly different.
This of course was the 90’s, so although caving attire was not much different, the obligatory floppy haircuts and lumberjack shirts were the travel clothes of choice and crammed into our very own minibus, with the club name on the bus changed to Wancaster by some wag in Inglesport we embarked on what seems a journey of epic proportions. The minibus was long bench style with 1km of rope piled up in the middle and 2 people half sat, half lying down on the benches, the rest of the team in the front. Not the most comfortable of journeys and the initial travel down to Portsmouth must have taken a good 12 hours, sat in various stress positions, with a broken heater and no radio. However, as a newbie to the expedition scene, the talk of huge resurgence caves and unexplored passage was more than exciting and I couldn’t wait to get out to Spain!
The ferry crossing was then, as it is now, pretty horrible. I personally suffer from really bad sea sickness, that can only appear to be cured by far too much drinking, presumably ‘scientifically’ correcting the imbalance in my head caused by the motion, to one caused by alcohol. Needless to say the journey passed in a haze of stumbling stupor…. for 24 hours. One positive was that at some point during the journey I ended up in a posh cabin, next to the captain’s quarter, a fine upgrade from sleeping on reclining seats. To this day I’m still not sure how I ended up there.
The following day the ferry slowly docked in Santander, the motion sickness and hangover now no longer working together and I just needed to get off that boat! Eventually I staggered back to the minibus and the other expedition members and finally we landed on Spanish soil. A times round the first roundabout before Sean (as designated Spanish driver) got the hang of driving on the wrong side and we headed off South towards the Picos.
The drive up through the Picos is always a fantastic view, the mountains getting larger and larger until you are driving up through huge gorges, with very large drops on either side. The roads are a lot safer now but even in 1996, a lot of the side barriers were made of wood and missing large sections where the snow had taken them off down the side. In a few places, far below, you could see often see cars that had been taken over the edge as well!
At Poncebos and the Cares Gorge (for those more interested in the Ario Caves Project) we turned off to the East and continued to climb up into the mountains, along further windy roads until the mountains level out on an obvious plateau and the village of Sotres (highest village in the Picos). Above the village the main mountain range of Andara reaches around 2200-2300m high and it’s only a few miles further that the ‘crossroads’ is reached. (The crossroads now, is actually a parking space for tourists and mountaineers, but at the time it was a mud turning circle, marking the junction between a dirt track to Tresviso, a dirt track to Bejes or a rocky track to the higher mountains.
The 1996 expedition was not actually based in Tresviso. A small camp site a couple of km’s up the mountain track and down into a meadow was the best site for pitching tents and having a suitable water source. The amount of equipment in the minibus meant 3 trips back and forth back were required and by the time tents were pitched and bags unpacked it was getting quite late. A quick meal (can’t remember what) and off to bed with the exciting promise of caving the next day!
The next day I had my first taste of expedition caving. The Cheese Cave, as it was called, was about 200m down the valley in a wooded clearing. First discovered in the mid 1980’s, it was a -120m deep cave with a drafting rift at the very end. The cave sat in the middle area between the resurgence cave, Cueva del Agua and the notorious higher altitude deep pot hold caves, such as Sima 56 (at that time the deepest in the Andara region at -1169m). That was pretty much all I knew about it, apart from a notorious squeeze near the start of the cave, called The Constriction of Doom, followed by the Corkscrew (probably of Doom as well). I’m not sure why cavers need to name parts of the cave with such hyperbole, maybe too much Harry Potter reading, or in the 90’s too much Xena, but it usually sets my mind racing about how bad it must actually be to earn such a name.
The passage of time (not another part of the cave…) has dulled what I can remember of that constriction and it has long since been widened by later expeditions, but it was pretty tight, think the Blowhole in Gaping Gill or Birthday Squeeze in Swildons, but 5m long, lying flat out on one side, starting in a puddle of water.
The Corkscrew (of certain death) was actually more intimidating than the constriction, starting in a small chamber full of shattered rocks, that appeared to be the only thing holding the entire roof up. In the centre a tight vertical drop requires an acrobatic sit / squat / twist combination, turning onto ones back and then rolling sideways to face the front, all of this with no space to turn head and look below.
A further 5m crawl then leads to the first pitch and the start of some ‘easier’ caving. A team was already in the cave from earlier in the morning, so all pitches were rigged. This was before easy access to drills andthrough bolts so all the pitches had a generous amount of natural rigging from any available rock, and in some cases mud, that provide a good anchor point.
The first couple of pitches are typical of the type of potholes in the area, being rather tight and rifty, with a lot of old decayed rock and calcite hanging precariously all over the place. In particular, the 3rd pitch Sword Pitch, starts for the first 5m over a hanging curtain of old calcite that rings with every touch. Even now the pitch requires a generous amount of rope protectors to rig with any sense of safety. Further pitches follow, but now an obvious draft is encountered, coming from lower down in the cave. At the Waiting Room, a low crawl leads off, which requires removal of all equipment, before popping out into a keyhole shaped passage with a cold breeze coming through a tight, impassable rift. It is at this rift that the previous expedition had spent many hours hammering away with a lump hammer and again this year the intended focus of our effort.
Out team of three spent a few hours hammering away, until the smallest member could just squeeze the top part of her body through the rift, tiredness and coldness prevented much further work and we exited the cave.
As my first taste of expedition caving, it was a nice gentle introduction. My second lesson was immediately after exiting the cave. Bearing in mind the cave was only 200m from the camp, the next 24 hours were spent lost in the mountains with no water and only a handful of alpine strawberries for food…..
Castleton, Derbyshire. 10th-11th June 2017
“Watch, you might learn something, this is how you remove a harness while at the top of a 70m pitch…”
The BCA AGM weekend was chosen as a suitable venue for the Tresviso 2017 pre-expedition meet-up. A good turnout of the entire expedition contingent (minus 10 people…) meant a comprehensive planning meeting was not required, so it was settled on bucking the trend and undertaking some caving. Friday night was spent catching up and trying to remember what rope lengths were in the car, and whether anyone had any rigging guides for any cave in the area. A few tentative plans were made before retiring for one of the wettest and most uncomfortable night’s sleep in a tent for a long while. The £5 festival pop-up tent just not cutting it in a thunderstorm, but all good training for the hardships of Tresviso…..
A leisurely start on the Saturday, largely due to the continued torrential rain but also waiting for Dave and Dan to turn up, gave way to a greasy bacon and egg bap, another element of the strict training regime. An initial planned trip to JH fell through, so Rowter Hole was settled upon. Further quality faffing time was spent, mainly measuring rope lengths and admiring the new shiny thermal mugs for the expedition. Following complaints from everyone that they had too many t-shirts from various caving expeditions, marathons and fun runs, we went for something slightly different, a mug that can get battered and scuffed, but most importantly allow the transport of alcohol to the underground camps.
Finally, 2 cars were packed and we set off to Rowter. A slight detour was considered, just so that Dave had longer to charge his lamp battery via the car charger, but by now it was getting close to lunchtime, so we thought we should get our act together, as 6 people down Rowter, could take some time. The rain was slowly easing but it was pretty wet all over the Peaks. Rowter Farm was windswept and cold but the intrepid team had time to stop and get a nice photo showing the scenery.
The entrance to Rowter sounded decidedly wet and given it’s a 70m pitch, a bit disconcerting. Luckily I had help in the guise of a lost chest jammer. I definitely had it with me back at Castleton, but it had vanished somewhere on route. I trudged off across the field to the sound of jeers from the rest of the team. All the way back to the car and no sign off the jammer. However, just to spoil my fun Chris had followed and ,although not finding the missing item either, he had a spare one in the car. Excuses now gone, I headed back over to see the last few people dropping down the entrance pitch.
The pitch is quite impressive, a long way down, and seems to take an age with my shiny new descender. The lack of my usual SRT equipment (it’s all in Spain after the May weekend trip) making me slightly uncomfortable, as to whether the harness was done up, cowstails long enough or old jammers might break. In the end there were no issues and I landed at the bottom of the pitch, to find everyone had gone…didn’t think I had taken that long.
I could hear Dave someone below, so I followed the obvious way down the cave and soon caught up with Dave and Alan, about to climb down a large scaffold climb. At the bottom a few more climbs before we met the others, coming back! The lower pitches were not rigged (after been told the previous night they were). No problem, who’s got the extra bag of rope? It’s back in the car.
No other option but to go out of the cave. A few slight diversions (not much to see, that we could find) and back to the big pitch out. A uneventful prussic out for everyone… .other than me, where I somehow ended jammed against the top knot at the top of the pitch. The less said about a performance of comedic proportions with people pulling my legs one way, and my harness the other, the better. It’s a training meeting after all.
All feeling a bit annoyed with our performance in planning so far we made a quick detour to Winnats Head Cave. Does anyone know the way? No, but luckily someone was left a guidebook at the entrance. A quick swot up and we enter the cave.
A really nice cave, albeit a bit wet on this weekend. An hour or so spent having a look round and then out. Back at the car, found my chest jammer!
In the pub later, Dave was press ganged into booking his Spain flight immediately and then further equipment requirements gathered before the BCA sing a long event started, at which point I left in haste.
Friday 28th April
A leisurely morning packing a few final things soon turned into a frenzied panic when I reweighed and realised I had somehow packed only 8kg fully into a bag and, via a broken luggage scale, thought that it weighed 20kg. I thought I must have just been getting fitter and stronger, but no just a bit stupider.
Luckily this meant I could fit in more group equipment, namely lots of ration packs and another sleeping bag, destined for the Death Race camps. An hour later I was over my weight limit, so final few things into the coat pockets and full hiking clothes for the flight over. A rather fetching pair of trousers and braces made me look like I was about to go yodelling in Austria.
Strensham services at 1pm to meet Gareth and transferred over equipment. Promptly set off and got stuck in the Bank Holiday traffic. Finally got to Manchester airport around 4pm to meet Hannah and Chris. Further repacking and off to the airport.
Incredibly slow security lines, gave me plenty of time to think about how much I didn’t really like caving and not sure how I got talked into coming out to Spain. It’s fine in then summer, I can lord it over people and pretend I know what I’m doing by barking orders and nodding sagely when the Spanish talk to me. However, this time I have to go once more to the back end of Cueva del Nacimiento carrying a ridiculously heavy bag, sleep in the dirt and generally feel bad about the state of my predicament. It is snowing in Tresviso so maybe it’s flooded and we can’t go down……
Naturally we were stopped at security, mine was due to some batteries that I had placed in a glove, so obviously I was trying to smuggle a robotic arm out the country. Chris however was stopped due to an unidentifiable item in the top of his caving helmet….. a salad.
Everyone seems excited, although bit shell shocked that we are now on the way and going to have to do some caving….
There must be nearly 30kg of food between the four of us, 5kg of sleeping bags, 1kg of first aid kits, stoves, petrol and that’s before we meet Alex and then pick up the obligatory Tresviso cheese….
Now in Spain, 5 people and 10 bags crammed into a Nissan Juke…. 2 more hours to go
Forgetting what time of year we are going this weekend, I’ve packed sunglasses and shorts….