635 Cave
La Colina 30T 0453874 4797282 Altitude 525m  Depth 45m Length 350m+

Updated 25th April 2005

Top entrance (originally positioned at VN53849728) lies above cliff and is a 5m climb followed by a 10m pitch (marked M-2 in old red paint) to a tight, draughting hole and a 15m pitch landing in a bouldery chamber.
To the west is a draughting bedding to three small chambers, the draught disappears out along a small hole. To the east lies a window into a small chamber and two obvious exits. Down leads through boulders to the base of a 20m pitch; straight on, the route splits, the left way leads to the surface through a series of crawls and squeezes, emerging at the base of the cliff (probably in site 273 or 274) while ahead a muddy rift leads to a traverse around the head of the 20m pitch and a climb up into a large chamber (approximately 80m x 40m). The chamber contains a number of pitches, all of which are choked.

A site marked M4, pictured below,  is more or less at the same position and is a 1m diameter, 15m deep (undescended) hole. The nearby M5 is probably site 1585.

References: anon., 1987 (logbook); material in file; survey; Corrin J and Knights S, 1988; anon., 2005b (Easter & summer logbook)
Entrance picture : possibly; marked M4
Underground picture(s):
Detailed Survey : 1:1000
Line Survey :
On area survey :
Survex file :