Updated 18th February 2012; 6th September 2019

   The entrance is a resurgence at the head of the wooded valley behind the old Fuente las Varas Bar, although it couldn't be found in August 2019 due to an approach through heavy vegetation to the top of the cliff.

   The whole of the cave is stooping or crawling in water and the "end" is where the going becomes flat-out. This point is approaching the painted flag on the Fuente las Varas crags and one or more of the resurgences around the cliff may well be the source of the water. (A dye test has shown that the water resurging from site 101 has no connection with Cueva de Fuente las Varas). The cave appears on the Cueva Hoyuca and the Four Valleys System Hydrology diagram.
   The stooping-sized cave entrance turns left to a small dam and immediately afterwards a waist deep pool with a silt floor is past to a stream passage which is mostly comfortable crawling or stooping, with one rift where it is possible to stand up. Exploration in 2001 appeared to stop a few metres short of the 1977 limit, in a pool with the way on very low. It may be worthwhile for a small person to push on at the end.

References: anon., 1977b (logbook); Corrin J S and Smith P, 1981; material in file; anon., 2001a (Easter logbook); Corrin Juan, 2003a; anon., 2019d (summer logbook)
Entrance picture : entrance  : 2001 resurvey and photo team
Underground picture(s): from 2001
Detailed Survey : 1:1000 (to be replaced by Easter 2001 version)
Line Survey :
On area survey :
Survex file : yes (Amended magnetic declination December 2013 to align with Eur79 grid and coordinates altered to fit ETRS89 datum, April 2014.)
Hydrology (Terry Whitaker): Hoyuca and the 4 Valleys System