News and cave exploration around Matienzo during 2025
A map with area names can be found here.

Section links    • Easter  • Whit • Summer • Autumn • Christmas / New Year

Pre-Easter

   The pre-Easter tranquility was broken by announcements that 4 new wind farms were proposed in Cantabria, 3 of which would directly impact areas which were either in our previous or current permit areas. The sites are
     • Moncubo (3 generators - affecting the areas around Monte Llusa, Cierrolinos, Garzón, Villanueva and El Rincón in the municipalities of Hazas de Cesto, Solórzano, Ribamontán al Monte and Meruelo)
     • Sierra de Sel (10 generators - affecting areas around Ogarrio and San Miguel in the municipalities of Ruesga and Voto)
     • Fuente Pico (3 generators - affecting areas around Llueva and San Miguel in the municipality of Voto)

   Detailed responses on behalf of Matienzo Caves Project concentrated on the inadequate Environmental Impact Studies. In these documents (each over 1000 pages) virtually no mention was made of karst or damage to the underground ecosystem. Misleading statements (i.e. a pack of ill-informed lies) were also made about decommissioning: "The restoration of the area to its pre-project conditions will have a positive impact on the relief."
   Local opposition to the 'polígonos eólicos' appears very strong. For example, two vecinos de Ruesga were interviewed on a Cantabrian Internet tv station (11 tv), March 26th and over 300 people walked along the Fuente Pico ridge on April 12th, including cavers from the MCP and vecinos from Matienzo.

   There was only a month (from March 10th) allowed to make formal objections. Our three documents have been submitted to the Federación Cántabra de Espeleología and sent to town halls and other organisations with an invitation to use the presented information in their own objections as they wish. The documents were also submitted as formal 'alegaciones' thanks to Helen Unger Clark from Ogarrio.

A pdf summarising Easter activities can be viewed here.

Introduction
   Over 40 cavers visited Matienzo and, along with partners and children, this meant over 50 people were visiting the area, with a lot camping behind Casa Germán. The weather was not very good given the late Easter, with some days of drizzle and rain. Water levels were reasonably low but for some reason the ground in the camping field behind Casa Germán did not drain and was wet when we arrived and got worse over Easter week. There has been more rain at Easter in the past, but the field did not get as bad as this year; ideally some drainage is needed. There were occasionally strong winds that again amused some locals looking out of their windows, as the big trailer tent blew over and was later "trashed", leaving the trailer to be taken home and converted into a trailer for logging.
   Our area permit for 2025 did not arrive in time for the start of the expedition due to a hitch at the Cultura; our application seemed to have been overlooked, but we had a receipt for the application papers. Once we contacted them with this receipt the permit was forthcoming. The area it covers has not changed. The permit requires cavers to contact the authority by phoning 112, informing them of the caving plans, and contacting 112 again when leaving the cave. The Federation are in discussions to see if this can be relaxed for area permit holders, although for now this system should be used.
    In our newer area to the NW, more work is still needed in the Hazas de Cesto and Ribamontán al Monte areas as far as the N642/A-8 motorway, where jungle bashing is the main obstacle for finding new sites.
    Many leads were checked out that had been highlighted for attention for some years, as well as old sites revisited over the winter. The most productive lead being Cueva de la Puerta (0024) that was pushed and linked to Cueva del Risco (0025), adding nearly 800m to the system. The other major find was getting through the boulder choke in Cueva de Rascavieja (0077), a major achievement finding over 400m of big passage to a drop that is still to be pushed in the summer. The Four Valleys System was extended by nearly 500m, bringing the length up to over 78.5km. In addition to these finds, eleven other sites were pushed and surveyed, giving us a total of over 2km of new cave for this Easter. This included finding a new top entrance to Cueva de la Espada (0103)– we now need to work to link this cave to Fridge Door Cave (1800) and hence the Four Valleys System. In addition to these finds, 21 new sites were recorded.

S O U T H E R N   S E C T O R

   In Cueva Vallina (0733), five trips took place. Two leads on the far side of The Canyon just led back to the main passage, but it was noted that an aven here has a "big space" at its top and may be worth a bolt climb. The end of Bathtub Passage was looked at and, through the choke, the passage ended in a sand choke; this will need checking whether the survey is correct or needs updating. A trip to Galería de la Cisterna was stopped by needing a ladder for the 8m access pitch (Man Trap). However, a passage simply marked as "climb" looks promising and may be a better bypass with only about a 2m drop at bottom needing a ladder. This is an important site as a passage from Sisters of Perpetual Indulgence nearly meets Galería de la Cisterna and if a link can be made this would allow easier access to the downstream streamway and sumps with no big pitches or stream traversing.
    The diving team of Mark Smith and Jim Lister dived the upstream Rio Rioja in high water conditions, making it hard work going upstream against the current. In the dry series beyond, where two large chambers and a side passage were surveyed to 146m but, due to lack of time, 120m of passage past sump 9 was not surveyed and is still open and going.

South Vega
   A familiarisation trip into Cueva-Cubio de la Reñada (0048) took place, but work to continue the resurvey of the bottom level of this system was not pursued but will be tackled in the summer.
    A photographic trip into Torca del Coterón (0264) got more complicated when the entrance rope was left just attached to the top bolts for a possible further trip, but when it was decided just to remove it while on a surface prospecting walk, it was found that someone on a through trip had rigged it further down, so a further trip with SRT gear was needed. Clearly this trip from Coterón to Reñada is a popular trip and gear left on the entrance pitch is likely to be used or adjusted.
    Torca de la Manga (5052) was attacked over three trips. A boulder and spoil blocking the pitch head was moved to give access. The bottom of this 24m pitch was blocked but a side rift was pushed. A number of possible leads were noted but there was little draught; it may be worth checking in hot weather. Photographs and video were taken, but a survey is still needed.
   Elsewhere on South Vega, 5 known sites were checked out, of which site 2656 was not found at the GPS location, site 5418 was written off and shaft 2697 was found as a small hole and would need a lot of work to enter – it was not considered worthwhile. Shaft 4681 appears to have been partly filled in and now needs a spade to dig out to gain access to a tight undescended 4m pitch. Secateurs would be useful to remove vegetation. At Cuevas de Copudia (0265), a bat was in residence.
    Two new sites were noted: a depression (5467) with slight draught, and a cave (5469) opened out a short way down into a moderate chamber around 5m in length. This was guarded by a perfectly preserved goat skeleton, complete with ear tag. A new hole 5485 is a small opening covered with scaffolding poles; stones fall 5 to 7m. Just out of area at Cruz Usano, a new dig 5486 was spotted.

Seldesuto
    Three trips into Torcón de la Calleja Rebollo (0258) were made to push a passage found in 2012 in "Girly Day Out". On the first trip the way was missed but after retracing steps the correct passage route was found, including passing an undescended drop that still needs looking at. Another familiarisation trip found bolts at the top of the 8m pitch between Sandy Junction and Saville Row to be heavily corroded, so on the next trip to Girly Day Out some rebolting and rigging was carried out, but the team still made quick progress to the lead left by Carmen Smith and Becka Lawson in 2008. The team surveyed and explored following Carmen's old footprints along a fault with lots of breakdown. The footprints stopped at a flat-out, compacted muddy crawl, which led into a chamber with a corkscrew climb up into known main route to Cloud 9. Just over 160m of new passage was added.

North Vega
    Three known sites and three new sites were visited. Cueva de Acebo (0433) was found to be a nice cave, but the continuation is too tight; cave 2601 had a good outward draught on a cool day and may be worth a dig; and cave 4113 could not be found at GPS location. The new sites were: a cave (5468) with a free climb down to a continuation under a rock bridge to an alcove after 8m; Canny Dig (5481) is a blind hole 2m deep to a rock wall that looks like it may be man-made, so worth a quick dig to check out; and - above the track - a small hole (5484, just big enough for a small person) 2m long to where stones roll down on the left out of sight; no draught on a cool day – could be worth a constricted dig.

Cubija Area
    Two sites found in 2024 were targeted. Shaft 5402 was found to be about 7m deep to a 3m diameter sloping floor with a too-small continuation that turns left; work is needed here to get to this corner and see if there is any prospect. The dig 5403 was opened up to reveal a 2.5m diameter 5m pitch, with a continuing drop. On two following trips this was pushed to the top of a 6m pitch to a large ledge looking into what looked like a passage. This drop was 10m and landed in a large chamber with nice formations. There were no passage outlets, just two alcoves, but there may be other possibilities in the floor, although on a cool day there was no draught. The site is still to be surveyed and needs checking for leads and draughts on a hot day. The site is about 20m deep with a length of 25m.
    While in the area, a small cave 5482 was found which seems to be an animal shelter 2m long and 0.3m high. The shaft 0593 is a 3m climb down to boulder blockage with a strong good outward draught. Some rocks and spoil were moved to reveal a 7m shaft which looks spacious below. Some blocks at the top need moving to allow access down this shaft.
   At the south end of El Nanso there was a major breakthrough at Cueva de Rascavieja (0077). Over the years the draughting boulder chokes at the end of this large cavern had been pushed. The main progress had been made on the more strongly draughting right side of the choke where green string had been left to show the route. The team then progressed to a boulder chamber that may be the one noted in the 1985 logbook where there is a larger space below but is too unstable to continue. With the moving of some boulders to a series of 8m high rifts, further routes to ongoing leads were found. On the next trip routes through the chokes were pushed; one after a final climb broke out into 8m wide passage. All the team marched off, with runners trying to work out the best route forward in the huge boulder breakdown. Eventually the team stopped the survey at a drop with the big passage continuing, marked as station 61, with about 250m surveyed in this extension. A large boulder in the first choke rolled down almost hitting a person, so this choke needs great care. To better tie in the resurvey, the old cave was re-surveyed on a further trip, and this included pushing and surveying a few small leads. In total over 400m of new cave was surveyed with the cave heading NW under the El Nanso ridge towards Torca del Mostajo (0071), which is still some 600m away.

El Sedo and Ozana
   The biggest find of the Easter expedition was in extending Cueva de la Puerta (0024) and joining it to Sima-Cueva del Risco (0025) at the Tonto Series, adding nearly 800m to the system.
    At Christmas 2024, the dig in Cueva de la Puerta went to a series of passages; this Easter these were pushed into a high narrow walking rift with the stream cutting down and the team traversing until an 11m pitch was met. On a second trip the trio of explorers laddered the pitch (traditional techniques as is appropriate for such an early numbered cave) to meet the streamway at a joining inlet and continued downstream. In a short dry passage some boot prints were noted, but who made them is not known. The passage then got very low and wet, and the higher level was climbed into, but this got very low and muddy, so the team again surveyed back to join up with the previous survey.
    Back at base and reading the 1975 journal it was clear that they had entered Tonto Series in Cueva del Risco which had never been fully surveyed. The next trip was from the Risco end where they surveyed the bottom part of Tonto Series to connect the last station surveyed in Cueva de la Puerta. The team also surveyed the top muddy passage. The only other trip into Risco was a tourist / photography trip to Where Have All the Spiders Gone.
   At Ozana a new dig 5464 next to the road was choked but you could look down 2m through the rocks. After some digging out it was still thought worth a further visit when, with caving gear and moving a few more rocks, access down will be possible.    Cueva del Concebo (0012) was visited and a lead on the far left led to a 15cm diameter hole needing work to progress. A few other sites were dug and about 5m of new cave found. All choked with stal or rocks and would need work to progress; no or little draught was felt.

La Colina
   Ten sites (including 4 new) were checked out by a large team of cavers and their families. Of the known sites, 1102 was an 8m choked shaft, 3553 was a 5m choked cave, 5399 was a 3m deep choked shaft but would dig, and 5400 was a 1m choked cave.
    Of the new sites, 5478 is a 3m tube to a 12m pitch to a choke with a crawl too tight to continue. The rift continues to the north with a strong draught and could be pushed by a slim person. However, while ascending the pitch head a large rock broke away in three parts; luckily the climber managed to somehow hold all the boulders together. The rocks were carefully removed then the people below made their way to safety. A return will require gardening of the pitch head as the side wall is unstable. This site was thought new but may be site 1320 that could not be found at its recorded location. Horse Piss Hole (5475) is a 2m deep choked hole with no draught but with the smell of horse urine! Bramble Pot (5476), covered with brambles, is a body-sized tube 4m long with no draught. Finally, a 4m long, choked, tight cave (5477) has no draught.

Muela
   Three new sites were located: an undescended shaft (5471) in a large shakehole; a shaft (5472) was dropped 5m to a ledge then a further 9m blind pot with animal bones at the bottom. A site (5473), just outside our permit area, was noted but it had been descended (bolt at top) and was marked M18. Two known sites were checked: a shaft (2338) is a 6m blind hole; and at the location of shaft 3130 two entrances were noted but not entered. The first is a 1m diameter hole concealed by grass that drops 3m with a ramp continuing round a corner and seems to be a new site; the second is a small 50cm hole with a small rock ledge covering part of the entrance with a drop of 3m to possible continuation. This seems to meet the description of site 3130, which is undescended.

N O R T H - E A S T   S E C T O R   I N C L U D I N G   T H E   F O U R   V A L L E Y S   S Y S T E M

La Secada 
  Using the Torca la Decepción (4732) entrance, the end of Rocky Horror north side was visited to check on the dotted passage shown on the old survey. It was found to be in boulders and was followed for 35m to a full blockage. The survey centre line looked similar to the existing survey centre line but on a close look it is a previously unsurveyed passage that is higher up and to the north of the centre line link to Cueva Llueva. The team also took photographs in Trident, Double Decker, Grand Slam Pitch, Rocky Horror, and Duckham's sump.
   At Socks (1017) more rocks were moved to give better access, and it was confirmed the main draught is coming from the boulder choke and not the small crawl in the chamber. More work on this key site will take place in the summer.
    The Carcavuezo entrance (0081) was found blocked by logs and wood; this was cleared and hopefully will be open in the summer. A new dig (5470) was found where a large rock slab has recently peeled away; more work here or back on the main rock face is required to see if it has any prospects.
   At Fuente las Varas, a trip to the 1977 end of Cueva de la Canal (0101) looked at a low passage which was opened to gain a 5m flat-out canal to another dig, which reached ongoing cave to a larger chamber with two ways on. Left was a low stream continuation, that requires digging; the right was open as a "pleasant" float on one's back along a snug canal, decorated with live flies, and is less than 150m (in plan) from the recently discovered El Gordo in Hoyuca, so is now called El Gordo Branch. On a second trip this was dug to a low and wide bedding plane, half full of water to where it was possible to slide along the draughting passage to where it very nearly emerged in dry passage. However. there is a jelly-like barrier of saturated mud, but that should dig. The right-hand route (now called Rocky Horror Branch) was pushed beyond the earlier limit to a low phreatic canal, with a fluted ceiling but little or no draught. It meets a small moonmilk cascade with a calcite bridge and a small triangular passage continuing. It needs digging to enter.
   The dig 5045 above Pablo's barn was dug on three occasions. As previously the nature (hydrologically altered with some voids) of the rocks made progress slow. The passage seems to continue, and volunteers are required in the summer to help on this dig.

Fresnedo
   The entrance area around cave 2414 and nearby shafts were surveyed. This site is situated above Torno (2366), and it was noted the survey drawing was wrong. There is easy access by road down to a barn from which there is an easy walk along a track to the cave. This site has potential and more digging is warranted.
    Cueva de Huerto Rey (2519) was visited; the entrance is walled up with big cobbles in middle of a steep, open meadow. The team got to the terminal low pool, and one slid in feet first and used wellies to feel for air space. After a body length and a half he got through, popping out into a hands-and-knees canal, which soon became standing height with a draught at times, round several corners and cross-rifts to a second duck. He tried to pass the duck using the same approach but with no success, so a retreat was made. The team looked at an undescended pitch in Cascade Chamber; digging opened up the top to allow access to a ladder down to the spacious pitch bottom, but sadly all ways on were solidly filled with sticky mud.

Riaño
    Three trips to Cueva de la Espada (0103) targeted four areas. The upstream passage from the north entrance going towards Fridge Door Cave (1800) is stopped by a tight bend at a T-junction. The wall needs some work to get round and see if it continues; some progress was made but more is needed to get to where you can see ahead. Possible passages at the fault in the top series was looked at but the passage just joined to the main route just ahead. An aven (about 14m) was climbed above the goat bones in the upper series. At the top the draught is significant with lots of roots and must be where animals have fallen down. The top is blocked by small loose rocks, making digging from the surface easier and safer if the site can be located. The other work was at a dig past a slot opened up last October. A flat-out short section through a stal grill gained the bottom of a large cone of rocks and bones. After digging this for a few hours the team could see into a bedding; with more digging they could see ahead and look through and see daylight which was dug out to form a new top entrance (5474). This route and its squeezes were opened up on a later trip. This top entrance is in wooded jungle and will be hard to find without a GPS.
   Six trips were made into Cueva de Riaño (0105) pushing and surveying a number of leads totalling 144m. At the top of the waterfall inlet in The Redeeming Feature chamber up Pessimism Passage, the 8m climb was bolted to a way up through a squeeze into the small stream passage above. With a bit of work access was made into a chamber (Cheesy Weiner Chamber). Immediately beyond this chamber, the way on was a crawl under an arch of crumbly fridge-sized, unstable boulders. Only three people continued into the choke and to the right a calcite floored passage continued for a few metres to a complete calcite blockage. To the left was impassable and the route in the stream became too tight.
    On another trip at the upstream extremities the team checked leads but only one went anywhere and was surveyed; it ended at a large slope leading up into a large breakdown chamber with spaces in the roof and roots so not far from the surface.
    A further trip to the Fossil Series was made to check leads off the Acid Bath junction. The team found several passages, but all reached mud chokes. It was noted that a number of passages are not on the survey, so the southwest arm was surveyed for 30m to a climb over an angled boulder from where it becomes lower and ends at a calcite blockage with a slight draft. A trip to unentered passages above Up To Glory found a climb up that should link into the large chamber on the survey but is blocked by boulders. Above Up to Glory the team explored side passages leading to drops and found a way down to join known passage. On the way out at Wedding Cake Passage a pitch was found (p4 and then about a p6), that likely connects with the stream below.
   The entrance series in Cueva Hoyuca (0107) was visited on two trips and some of the question marks on Footleg's survey checked out and new passages surveyed. On the first trip the team familiarised themselves and noted a few unsurveyed passages and also found their way to Church Entrance and what they said was thigh-deep liquid mud which smelt organic – not too surprising as it comes from the farm and muck pit up the surface slope, hence why this otherwise easy entrance is not used. On the following trip just short of 100m of surveying of the passages not shown on the survey were completed.
   In Fridge Door Cave (1800) using the Boob Tube entrance (5000) three trips were made, but a fourth to dive sump 8 had to be abandoned due to frisky cows in the field around the entrance!
    On the first trip the team dug out a drafting side passage off Sandy Passage near the entrance, to reach a new passage of stooping height but it soon went flat-out to another dig, which proved to be too small – the passage called Blood, Sweat and Tears.
    On a pushing trip to try and connect again to Cueva Llanío (3234) it was quite clear that the Sump 2 had flooded to the roof since the last visit. At the pushing front it degenerated into a flat-out muddy crawl. At the east end the team linked into Llanío making the second connection. They also looked at leads in Low in Knickers, but most got too small. One aven looks worth a climb.
    On a further trip at Matienzo Hash House Harriers the traverse at the start was dropped 8m to reach horizontal passage with a muddy floor, views down to a stream and a sump towards the south.
    At Ariadne Passage a rock in the roof was moved to give access to a draughting standing passage. Further on, the floor was dug out to access more passage with a mud floor that will need more digging to continue.
    A new undescended shaft (5479) was found. It has a wide top and is about 8-10m deep. It is not possible to see the bottom due to the vegetation. There was a cool draught coming out.

Hornedo
   Three sites were looked at in this area. The draughting shaft 3738 was visited and dug on three occasions and making progress so you can now see down into a winding passage where rocks trundle down a slope out of sight; more work is now needed. The tight rift cave 5353 was found to draft in and out at times and is an awkward dig in the tight rift, but on the last trip progress was made to reach the top of the deep pitch (estimated at up to 50m) needing work to open up and also re-rigging is needed. In Twin Entrance Cave (3569) the right wall pitch was looked at. This is a tight and sharp 8m pitch followed by a too-tight 5m pitch that when rocks are dropped sounds bigger below. More work is needed to access this 5m pitch.

N O R T H W E S T   S E C T O R

Solórzano
   A new hole (5483) to the west of the big sweeping hairpin bend on the road down to Solórzano, was found. It is a choked 1m deep slot in a prominent 4m high cliff face that goes across the densely jungled valley. The cliff contains a number of tiny overhang shelters and holes. A nearby shaft 3974 at the back of a depression requires digging.

Hazas de Cesto & El Rincón
   A new dig 5463 near the road from El Rincón to the motorway was dug as a crawl to a large block; after digging it was possible to see a further 2m to where the cave closed down. Direct access to the cave 4934 was attempted, but like Boob Tube, frisky cows (warned by the farmer) prevented access by this route. Bashing through the jungle can get you to the site but that is not a good option.

Moncobe
    The following trips were carried out with the agreement of the club G.E. Pistruellos.
    At El Cubillón (2538) five diving and pushing trips were made with the main aim of diving sump 2. In preparation, tackle was carried in with the help of a good non-diving team. Resin anchors were installed and some rocks moved to improve access for the diving team. The traverse above the sump was looked at but needed bolting gear to safely progress.
    Mark Smith dived the upstream inlet sump and found it closed down after an air bell at 9 metres. The sump is situated beyond a tight, active stream passage, (crawling with water filling most of the height).
    Mark and Jim Lister dug out the gravel-filled streamway that leads to downstream Sump 2, to improve access and egress. Despite work the year before, it was still very tight, and Jim had breathed in some water in the tight bit the day before trying to pass it. A few days later the diving duo went to push downstream Sump 2, but it had chocolate-coloured water cascading down into the sump 2 pool. Jim descended vertically down in zero visibility in the nearly vertical pot. At 15m the pot reduced in size to a 1.5m wide slot, with a soft sloping, mud floor. Jim proceeded along, feeling with his hands; at 5m the roof raised up vertically in a narrow slot. The rift continued for about 50 metres to a blank wall; no continuation could be found. Jim returned to the vertical upward slot, found on the way in and ascended to the roof and then traversed a few metres sideways to where he was able to ascend again, until a roof was met again. The passage continued left in nil visibility so Jim could not see his gauges, so he decided to head out. It was with some relief when he reached the vertical slot down as the retreat had been difficult. This was due to the cylinders catching and the difficulty of lifting them with his arm behind his back, or when this was not possible lowering the top half of his body as much as possible and bringing his legs up and wriggling backwards.
    With relief the bottom of the rift was gained and the pot ascended to the surface. (Dive time 35 minutes).
   Assessing the prospects, Mark suggests this sump has possibilities, but with zero visibility, caused by the knee-deep, glutinous mud on the approach, it is very difficult. Future exploration may be better spent looking at the heavily draughting upstream inlet that does not require diving equipment to get to as Sump 1; this now has air space for its full length and could be completely drained if the trench was excavated deeper.
   The dig 4480 was visited to clear out spoil from previous work in 2024 but, with the rain, the site was found to be a bit sloppy; better in dry weather.

Easter Expedition report by Phil Papard, 24th May 2025

New surveys and survey updates
Description		Drawn survey	Survex centre line
0024	Cueva de la Puerta	in hand (CSF & PS)	0024
0077	Rascavieja	in hand (RL)	0077
0101	Canal	interim (JC)	0101
0103	Espada +	complete (JC)	0103
0105	Riaño	4VS in hand (PF)	0105
0107	Hoyuca	4VS in hand (PF)	0107
0258	Toad	complete (JC)	0258
0733	Vallina	complete (JC)	0733
1800	Fridge Door	complete (JC)	1800
2519	Huerto Rey	complete (JC)	2519
2538	Cubillón	complete (JC)	2538
5052	Manga (sketch)	complete (PO'N)	-
5403	Chamber (sketch)	complete (PW)	-

The list below shows links to those 80 sites which were extended or newly discovered around the Easter 2025 period, or which have had surveys, references or descriptions updated, photos or movie clips added, or entrances repositioned using a GPS.

Arredondo 0733 Vallina, Cueva;
Cubija 5402 shaft; 5403 Chamber Pot; 5482 cave;
El Naso 0077 Rascavieja, Cueva de; 0593 shaft;
El Rincón 4869 Barrera de la Real, Cueva de la; 5417 cave; 5463 cave; 5465 shaft; 5466 depression; 5479 shaft;
El Sedo 0024 Puerta, Cueva de la; 0025 Risco, Sima-Cueva del;
Fresnedo 2414 cave (wet dig); 2519 Huerto Rey, Cueva de; 5461 cave (original); 5462 cave (Fridge Door);
Fuente las Varas 0101 Canal, Cueva de la;
Hazas de Cesto (west) 4934 cave;
Hornedo 3569 Twin Entrance Cave; 3738 shaft; 5353 cave;
La Colina 1010 cave; 1102 shaft; 1320 shaft; 3553 shaft; 5399 cave; 5400 cave; 5475 Horse Piss Pot; 5476 Bramble Pot; 5477 cave; 5478 shaft;
La Secada 0081 Carcavuezo, Cueva de; 1017 Socks; 5045 dig; 5470 dig;
Moncobe 2538 Cubillón, El; 4480 dig;
Muela 2338 shaft; 3130 shaft; 5471 shaft; 5472 shaft; 5473 shaft;
N Vega 0433 Acebo, Cueva de; 2601 cave; 4113 cave; 5468 shaft; 5469 shaft; 5481 Canny Dig; 5484 dig;
Ozana 0012 Concebo, Cueva del; 0017 Jivero 2, Cueva de (top entrance); 5464 dig;
Riaño 0103 Espada, Cueva de la; 0105 Riaño, Cueva de; 0107 Hoyuca, Cueva; 1800 Fridge Door Cave; 3234 Llanío, Cueva-Cubío del; 5000 Boob Tube; 5474 cave; 5480 cave;
Riva 5486 shaft;
S Vega 0048 Reñada, Cueva-Cubío de la; 0264 Coterón, Torca del; 0265 Copudia, Cuevas de; 1517 cave; 1913 cave; 2656 shaft; 2697 shaft; 4681 shaft; 5052 Manga, Torca de la; 5418 rift; 5467 depression; 5485 shaft;
San Antonio 3084 dig; 3245 cave;
Seldesuto 0258 Calleja Rebollo, Torcón de la;
Solórzano 3974 shaft; 5483 hole;

• Easter 2025 logbook)