Has been descended a fair few times, ends in the ‘swimming hole’ of Siberia Hut, so you can expect some observers when you arrive. No info on the canyon, but from the valley you can see a bunch of stacked waterfalls… I’d be taking a drill and at least 2x60m ropes and a staunch bushbashing…

Done in 2015 by the French “Aotearoa Expedition” Apparently it was reasonably short, but pretty good. No other info… Fixed wing access to the Airstrip and a hut nearby… who is going to check it out again and get a topo and some photos??