Andy Brooks' log, June 2010 Monday 6/28 About 15 minutes pleasant shady walk from Verde Puron brings you to the source. Immediately beyond the fish hatchery, there are three distinct resurgences, all at about 57m ASL (according to my uncalibrated Garmin). The first comes in from the (stream) left bank, this resurgence is choked but there are some holes about 10m higher (68m ASL) including a couple which are draughting strong and cool outwards. The hole with the strongest draught is just about caver sized. The grass and debris indicate that water emerges from at least this high up under flood conditions. The second resurgence is underwater in the dammed pool, and it also appears to be choked. However, there is a large cave entrance about 15m above (72m ASL), some 8m wide and 3m high. It closes down rapidly, but there are a couple of holes in the floor. There seems to be a cool draught in places outside the cave, but I could not pin it down to any particular hole, and it seemed to be absent inside the cave. There is some shoring around one hole which descends almost vertically for at least 6m, so someone has been putting some effort into excavating this site. As I was in travel kit (shorts and T-shirt, no hat) I didn’t do any groveling. The third resurgence is across the pool; water comes in below the dam from a tiny hole which cannot be entered. The valley shown running east on the map was completely dry. I did not pursue it, but since the other resurgences had flood overflows some 10 to 15m higher, it might be worth taking a look. Overall impression – it’s an extremely promising site, and in view of the several draughting holes I suspect that there is mucho cueva to be found if the right boulders can be moved. Volume emerging appeared to be similar to the Rio Ason below Cuvera. Tuesday 6/29 Started up from Tielve approx 09:00, reached (wrong) col about 10:30 (Entrejano, got some nice pictures there), had some route finding difficulties, finally arrived at Majada Tordin about 11:45. Trails on the 1:25000 Sigpac map were pretty random as far as actually existing on the ground. The cave at Tordin is actually more inviting than the pictures show, because as you approach it you hear the roar (OK, roar is an exaggeration) of water inside. A Swildon’s sized stream appears just inside the entrance and disappears into the unknown. There is a slippery 5m scramble over rocks and bags of rubbish, which I did not attempt to descend, followed immediately by a pitch of 8m or so, then the streamway turns left and out of sight. At the furthest point I could see, the passage was about 3m wide and 15m high. Obviously someone needs to go in there with caving gear (I am sure someone has, but I just haven’t found a reference to it). The entrance is just about exactly 1200m altitude. There is a fuente in Majada Tordin which I didn’t want to share with the cattle, so fortunately there is another just over the hill (if you take the track up to the left of the cave). I had hoped to look at the big depression below Pena Crimienda, but more route finding problems, along with a plethora of small holes and depressions demanding my attention, not to mention tired legs, forced a return at 1:30. At this time I was at a steep hole 15m or so deep with a possible entrance at the bottom, now marked as a waypoint. Taking a more direct route down, I was back at Tielve around 3:15.