3116: Cuatro Entradas, Cueva de
Llueva 30T 456235 4797262 (Datum: ETRS89. Accuracy code: G) Altitude 205m
Length 245m Depth 31m
Area position

Updated 7th November 2009; 19th September 2019

   A difficult cave to find that is deep in the "jungle" between the Llueva valley floor and the track that runs round the north of Muela from Collada de Esquilo. The cave is best approached from the valley floor track that leads to Covarona. After about 20 mins up hill walking, the track turns to the north (right). At this point turn left (this is the left side track before the one leading to Covarona) and go ahead for some 250m to a less dense area of forest in a depression. Walk and climb to the north for about 100m until an open area is met with a cliff at its back. On the left back wall is the western entrance. Other entrances are more difficult to approach due to the thick vegatation.
   The cave starts with an easy walking passage with the "sky-light" entrance above. The passage continues to enter the side of a sloping chamber with the biggest entrance up slope to the south. Just before reaching this chamber is a connection to a parallel passage back to another entrance in a cliff face. In the chamber opposite the big entrance is a possible high level unexplored passage, needing scaling equipment. This is the well decorated high level (to the south) that was possibly bolted to and explored in the summer, 2009. This is shown on the latest survey.
   Down slope reaches a climb down to a low slide over flowstone to a high chamber with a rift above that connects with the entrance chamber - there may be a possible continuation of this rift at roof level to the east, but this looks unlikely.
   Percolation water runs over a sloping floor of gours to the east under the chamber wall to drop into a small hole with a possible inward draught (in winter) but the way on looks very heavily calcited up and is not a good prospect.

   There are a number of old bones in the cave, come calcited in place, including a large antler found on the north-west side of the bottom chamber.
   A survey data sub-set was tied in (September 2019) but may have been linked in the wrong place.

Reference: anon., 2008g (Christmas logbook); anon., 2009c (summer logbook); Corrin Juan, 2010 (photos); anon., 2019d (summer logbook)
Entrance pictures:
Underground pictures :  yes
Video :
Detailed Survey :  from 2008 : from 2009
Line Survey :
On area survey :
Survex file : yes (2009) (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)