Question: How long is the Castlereagh River in New South Wales??
Answer:
How long is the Castlereagh River in New South Wales?
Estimates of the length of the course of the Castlereagh River from its commencement to its mouth vary from 541 kilometres (336mi),[2] 549km,[3] and 566km.[1]  Over its course it drops over 600m.
541 kilometres (336mi)