Bulmer Lake by photos 22 Jul 201619 Jul 2016 by Tony Gazley Date: 30 June to 3 July 2016. Trip type: Medium tramp. Location: Kahurangi National Park. Author: Tony. Trampers: Tereza, Megan, Jade, Michael, Graham, Diarmuid, Tony, David, Holger, Kevin. A trip in the Mt Owen area of Kahurangi National Park in search of an Owen Ice Cave.