Updated 25th May 2003; 1st February 2006; 16th April 2008; 26th June 2010; 26th September 2012

[A GPS reading at the wall outside the entrance is 30T 0451550 4800779]
A short drop over the wall below site 1804. A 2m climb down drops to a squeeze over boulders to a 10m passage with rifts down on the left. At the end, a flat-out crawl over and under boulders revealed a view into a possibly roomy continuation that was left for 2003.
At Easter 2003, the rifts in the floor were enlarged and access gained to the lower passage which choked towards the surface. The route over the boulders was also enlarged to where the route at floor floor level was choked with big slabs. The higher level lead to a continuation of the rift but this was found to have an aural and visual link with site 1804.
In 2012, at the base of the short pitch, excavation in boulders increased the depth about 2.5m, but more boulders, with no room to work, prevents progress.

Site 1805 should be surveyed at some point, rather than sketched.
Both sites appear to be near to the supposed downstream continuation of Cueva Riaño (site 105) .

Reference: anon., 2002b (summer logbook); anon., 2003b (Easter logbook); Corrin Juan, 2003b; Corrin Juan, 2005; anon., 2008c (Easter logbook); anon., 2012d (summer logbook)
Entrance picture: yes
Underground picture(s): yes
Videos: by Juan Corrin
Harry Long moving into the "chamber" : Harry drilling into a boulder at the flat out crawl : stubby straws
Terry Whitaker, Harry and Lank - drilling finished : Plugs and feathers
Harry attempting to descend the rift : Drilling calcite to enlarge the rift
Bottom of the rift : Emerging from the tight rift
Detailed survey: 1:500
Line survey:
On area survey:
Survex file: