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MATIENZO CAVES PROJECT
Cave Systems

   Cave systems are defined here as cave passages usually with more than one entrance which can be traversed by cavers or cave divers, or are proved by water tracing. Some "systems" have only one entrance but the length (>2.5km) warrants inclusion here. Currently, not every system has separately numbered (or GPS'd) entrances, e.g. Coquisera (0039).
    The major system names are usually named after the area or geographical features; minor systems are arbitrarily named, perhaps as combined names.
   [Note: There are inconsistencies. For example, Boyones (water-traced) is shown as part on the Four Valleys System whereas El Cubillón is not (yet) shown below as part of the Aguanaz system, even though it has been traced to that resurgence. (Should the length of Cubillón be shown in such a system?)
   Although the policy is to give each "hole in the ground" a separate code, this is not always carried through. For example, the small, dry entrance to Agua / Molino (#0059) is code-less.]

Below, each alphabetically-ordered system name can be clicked on to show the cave entrances (which link to the cave description) and clicked again to close the system components. The Four Valleys System is shown as 'Cuatro Valles, Sistema de'.

• Latest update or check: 15th December 2024. Still to unravel: some of the caves of Ogarrio?

0348 (narrow rifts) (Length: 20m, Depth: 7m) - La Secada
MAP
Access through:
#0348 cave#1612 cave
1514 (+2 entrances) (Length: 112m, Depth: 8m) - S Vega
MAP
Access through:
#1514 cave
1538 / 3437 (Length: 53m, Depth: 11m) - S Vega
MAP
Access through:
#3437 cave#1538 cave
2442 (+ field entrance) (Length: 15m, Depth: 0m) - Ozana
MAP
Access through:
#2442 cave
3261 (+ shaft entrance) (Length: 106m, Depth: 17m) - Hornedo
MAP
Access through:
#3261 shaft & cave
3938 / 3839 (Length: 66m, Depth: 15m) - Trillos
MAP
Access through:
#3938 cave#3939 cave
5372/5373, Sistema de (Length: 35m, Depth: 13m) - Trillos
MAP
Access through:
#5372 cave#5373 cave
77A, Cueva (Length: 466m, Depth: 5m) - Secadura
MAP
Access through:
#0154 77A, Cueva#5450 Rite Here!#5449 Rite Now!
Abono / 1470, Sistema (Length: 425m, Depth: 65m) - S Vega
MAP
Access through:
#0033 Abono, Cueva del#1470 shaft
Aguanaz, Fuente (Length: 5299m, Depth: 43m) - San Antonio
MAP
Access through:
#5453 Aguanaz, Fuente (bottom entrance)#5452 Aguanaz, Fuente (middle entrance)#0713 Aguanaz, Fuente (top entrance)
Bat Cave (+ small entrance) (Length: 9m, Depth: 0m) - Riaño
MAP
Access through:
#1532 Bat Cave
Bollón / Hole in the Road, Sistema de (Length: 1849m, Depth: 82m) - La Secada
MAP
Access through:
#0098 Bollón, Cueva de#1452 Hole in the Road
Calleja Rebollo, Torcón de la (Length: 8208m, Depth: 118m) - Seldesuto
MAP
Access through:
#0258 Calleja Rebollo, Torcón de la
Camino 1988, Cueva del (+ second entrance) (Length: 25m, Depth: 6m) - Arredondo
MAP
Access through:
#2115 Camino 1988, Cueva del
Campuvijo, Cueva de (multi-entrance?) (Length: 925m, Depth: 0m) - Ogarrio
MAP
Access through:
#0287 Campuvijo, Cueva de
Cefrales, Cueva de los (Length: 554m, Depth: 59m) - S Vega
MAP
Access through:
#0042 Cefrales, Cueva de los#4210 Cefrales, Cueva de los (bottom entrance)
Cobadal, Sumidero de (Length: 7493m, Depth: 101m) - Cobadal
MAP
Access through:
#1930 Cobadal, Sumidero de#5451 Cobadal, Sumidero de (bottom entrance)
Collada / Eastwater, Sistema (Length: 1109m, Depth: 50m) - La Gatuna
MAP
Access through:
#0394 Collada, Cueva de#4537 Cueva Collada (entrada 2)
Colmenas / Escalón, Sistema de (Length: 2688m, Depth: -66m) - N Vega
MAP
Access through:
#0363 Colmenas, Fuente de las#0280 Escalón, Fuente El
Copudia, Cuevas de (3 entrances) (Length: 290m, Depth: 12m) - S Vega
MAP
Access through:
#0265 Copudia, Cuevas de
Coquisera, Cueva de (+ 3 shafts) (Length: 2380m, Depth: 144m) - S Vega
MAP
Access through:
#0039 Coquisera, Cueva de
Coverón, Cueva del (Length: 3580m, Depth: 75m) - Riva
MAP
Access through:
#0002 Coverón, Cueva del
Cuatro Entradas, Cueva de (+ three other entrances) (Length: 245m, Depth: 31m) - Llueva
MAP
Access through:
#3116 Cuatro Entradas, Cueva de
Cuatro Valles, Sistema de (Length: 76908m, Depth: 189m) - La Secada, Llueva, Riaño, Secadura
MAP
Access through:
#5000 Boob Tube#0117 Boyones, Los#0081 Carcavuezo, Cueva de#3895 cave#2903 Church Entrance (Hoyuca entrance)#4732 Decepción, Torca la (bottom entrance)#0252 Decepción, Torca la (top entrance)#1800 Fridge Door Cave#2691 Giant Panda entrance#0107 Hoyuca, Cueva#3234 Llanío, Cueva-Cubío del#0114 Llueva, Cueva#2974 Number 1 entrance (Hoyuca)#0575 Riaño Resurgence, Cueva#0105 Riaño, Cueva de#2872 shaft (Hoyuca entrance)#4536 Sub-phone entrance#5368 Vaca Bypass
Cubija, Sistema de (North Vega System) (Length: 22949m, Depth: 147m) - Cubija
MAP
Access through:
#0243 Cubija, Cubío de#0774 Morenuca, Cueva de la#0071 Mostajo, Torca del#0892 Regaton, Torca del
Cubillón, El (Length: 2797m, Depth: 92m) - Moncobe
MAP
Access through:
#2538 Cubillón, El
Cuesta de la Encina, Cueva de la (+ cave & roof entrances) (Length: 229m, Depth: 9m) - Navajeda
MAP
Access through:
#4112 Cuesta de la Encina, Cueva de la
Diablo, Gruta del (+ upper entrance) (Length: 18m, Depth: 0m) - Hoznayo
MAP
Access through:
#4244 Diablo, Gruta del
Espada / Ruchano, Sistema de la (Length: 2380m, Depth: 39m) - El Suto, Riaño
MAP
Access through:
#3222 cave#0103 Espada, Cueva de la#3232 Ruchano, Cueva del
Fresnedo 1, Cueva (+ top entrance) (Length: 262m, Depth: 16m) - Fresnedo
MAP
Access through:
#0126 Fresnedo 1, Cueva
Fresnedo 2, Cueva (Length: 9620m, Depth: 30m) - Fresnedo
MAP
Access through:
#0841 Fresnedo 2, Cueva
Fuente del Francés, Cueva de la (+ bottom entrance) (Length: 126m, Depth: 5m) - Hoznayo
MAP
Access through:
#4171 Fuente del Francés, Cueva de la
Fuentes, Sumidero de (Length: 60m, Depth: 3m) - Arredondo
MAP
Access through:
#3270 Resurgence de Fuentes, Cueva#1757 Sumidero de Fuentes
Helechales, Cueva de los (Length: 600m, Depth: 148m) - S Vega
MAP
Access through:
#1679 cave#0408 Helechales, Cueva de los
Humo, Cueva del (Length: 90m, Depth: 40m) - Seldesuto
MAP
Access through:
#5388 Humo, Cueva del (east entrance)#0045 Humo, Cueva del (west entrance)
Humo-Esquimadera, Sistema de (Length: 2160m, Depth: 167m) - Ogarrio
MAP
Access through:
#0739 Esquimadera, Torca de#0734 Humo, Cueva de
Injanas 1 & 2, Sistema de (+2 smaller entrances + 2 shafts) (Length: 304m, Depth: -11m) - Hoznayo
MAP
Access through:
#4444 Injanas 2, Cueva de las#4001 Injanas, Cueva de las
Invisible Cave / Entrada Tres, Sistema de (+ excavated entrance) (Length: 704m, Depth: 46m) - San Antonio
MAP
Access through:
#3291 Entrada Tres#3283 Invisible Cave
Jivero 1 / 0246, Cueva de (Length: 503m, Depth: 7m) - Ozana
MAP
Access through:
#0246 cave#0016 Jivero 1, Cueva de
Jivero 2, Cueva de (Length: 517m, Depth: 9m) - Ozana
MAP
Access through:
#0017 Jivero 2, Cueva de (top entrance)#5454 Jivero 2,Cueva de (bottom entrance)
Mazo-Chopo, Sistema de (Length: 270m, Depth: 0m) - Ogarrio
MAP
Access through:
#5151 Chopo, Cueva del#0961 Mazo, Cueva del
Molino / Cuevona, Sistema de (Length: 2055m, Depth: 12m) - El Naso
MAP
Access through:
#0248 Cuevona, La#0059 Molino, Cueva del
Molino, Cueva del (Length: 2350m, Depth: 123m) - Bustablado
MAP
Access through:
#0727 Molino, Cueva del#5250 Molino, Cueva del (2nd entrance, shaft)#0791 Molino, Cueva del (resurgence)
Mortiro-Esquileña, Cueva (Length: 770m, Depth: 18m) - Riva
MAP
Access through:
#0005 Mortiro, Cueva del (top entrance)#4272 resurgence (E)
Nabo, Cueva del (Length: 1280m, Depth: 25m) - La Gatuna
MAP
Access through:
#0978 cave#3357 Nabo, Cueva del
Orillón, Sistema del (Length: 710m, Depth: 40m) - Ozana
MAP
Access through:
#1161 Malbujero#0023 Orillón, Cueva del#1162 Orillonzuco
Peña Encaramada, Torca de (Length: 4931m, Depth: 52m) - Hornedo
MAP
Access through:
#3380 Peña Encaramada, Torca de
Pico del Hayal, Cueva del (+ shaft entrance) (Length: 49m, Depth: 20m) - Llueva
MAP
Access through:
#1234 Pico del Hayal, Cueva del
Picón, Simas del (+ 1 larger shaft entrance) (Length: 2717m, Depth: 110m) - Cubija
MAP
Access through:
#0075 Picón, Simas del
Regato, Cueva del (+ bottom entrance) (Length: 1562m, Depth: -85m) - Fresnedo, San Antonio
MAP
Access through:
#3494 Regato, Cueva de#0672 Regato, Cueva del
Riocueva-Cañaos, Sistema de (Length: 5156m, Depth: 34m) - Hoznayo, Villaverde de Pontones
MAP
Access through:
#4043 Cañaos, Torca de los#4085 cave (Riocueva bottom entrance)#4088 resurgence#4087 resurgence#4086 Riocueva 2, Cueva de#4042 Riocueva, Cueva#4084 shaft (capped)
Risco, Sistema del (Length: 11840m, Depth: 96m) - Cubillas, El Sedo, Ozana
MAP
Access through:
#0027 Oñite, Cueva#0025 Risco, Sima-Cueva del#0026 Tiva, Cueva de
Santiago, Cueva de (+ 1 or 2 entrances?) (Length: 54m, Depth: 0m) - Solórzano
MAP
Access through:
#4002 Santiago, Cuevas de
Selvijo, Cueva del - Ozana
MAP
Access through:
#0028 Selvijo, Cueva del#5401 Selvijo, Cueva del (entrada 2)
Suviejo / Rayo de Sol, Sistema de (Length: 5353m, Depth: 111m) - Secadura
MAP
Access through:
#0123 Rayo de Sol, Torca del#0122 Suviejo, Cueva de
Three Idiots / Andando, Sistema de (Length: 238m, Depth: 72m) - Secadura
MAP
Access through:
#0689 Andando, Torca#2786 Three Idiots
Torca la Vaca, Sistema de (Length: 23914m, Depth: 67m) - Barrio de los Urros, Hornedo
MAP
Access through:
#3916 BigMat Calf Hole#4182 Cuba Libre, Cueva#4117 Doldy's Cave#3034 Langdales, The#2889 Vaca, Torca La#0767 Wild Mare, Cave of the
Torno, Cueva del (Length: 5471m, Depth: 60m) - Fresnedo
MAP
Access through:
#2366 Torno, Cueva del
Torre, Cueva del (+ 2 entrances) (Length: 21m, Depth: 6m) - Riolastras
MAP
Access through:
#4060 Torre, Cueva del
Túnel, Cueva del (+ second entrance) (Length: 40m, Depth: 0m) - Llueva
MAP
Access through:
#0658 Túnel, Cueva del
Vallina, Cueva (Length: 0m, Depth: 94m) - Arredondo
MAP
Access through:
#0753 Rotura, Torca de#4382 Vallina (bottom entrance), Cueva#0733 Vallina, Cueva
Vega Sur, Sistema (Length: 34783m, Depth: 339m) - S Vega
MAP
Access through:
#0333 Azpilicueta, Torca de#0040 Comellantes, Cueva del#0264 Coterón, Torca del#1471 Papá Noel, Torca de#0048 Reñada, Cueva-Cubío de la#4221 Reñada, Cueva-Cubío de la (top entrance)#0675 shaft#1338 shaft#0036 Vera Negra, Torca de la
Wild Horses, Cave of the (Length: 220m, Depth: 33m) - Muela
MAP
Access through:
#0509 Wild Horses, Cave of the (bottom entrance)#0647 Wild Horses, Cave of the (top entrance)