Pozo Azul exploration: A fascinating cave exploration project!
Pozo Azul is currently the longest cave dive penetration in the world,
And more than 9.4km of diving accumulated over 5 sumps are required to reach the furthest point from the single entrance.
Located in the village of Covanera, Burgos, Spain, El Pozo Azul is probably one of the most challenging cave exploration project. Already 5 sumps (maximum depth 71m) had been explored. And in 2015 J. Mallinson pushed the exploration solo and discovered a 6th sump and spent a total of 60 hours inside the cave.
In 2001, Jason Mallinson first visited the site with Rupert Skorupka. At that time the known part of the cave was a 1st 700 m sump, then a dry tunnel of 300 metres, followed by a second sump penetrated for 780 m. On that same trip the sump was pushed to 1250 m.
Jason then returned year after year, sometimes with other top divers, and sometimes on his own.
In 2009 the sump was passed after 5160 m – the longest sump to be passed in the world, to reach Sump 3. This was passed in 2011 and proved to be over 3 km long. From this point, the sumps became shorter and the amount of dry passage longer.
Sumps 2 and 3 are actively linked and are in fact one long sump of more than 8km in length.
in 2015 Jason returned solo. He traversed more than 10 km of sump to explore dry passage and find a sixth sump.