You might be thinking of the delightful little glacial lake on the north side of Sarah Jane. Excellent camping spot, close to Angel Falls and with a fascinating section of ridge immediately above it (part of Lightning Ridge, I suppose). Behind the Lake is a huge hanging wall of Dolerite extending off Sarah Jane - the rock beneath the Dolerite has eroded faster and left the wall partially suspended - stunning.
- Mount Sarah Jane and the Hanging Wall
I haven't seen a name for the lake on any map - anyone else know what it is called?
By the way, this isn't a day walk. Its quite a slog up to Sarah Jane and most people would need to stay the night - you can do it if you base yourself at Judd.