Here is an article on a group who walked the length of the Colo from the Sydney Morning Herald Thur 1st February 1934, page 10. The group completed this walk in 12 days, which, without the aid of modern equipment sounds like a remarkable effort.
The Colo still presents some challenging and excellent bushwalking opportunites and suits all grades from novice to expereinced walkers. There are some excellent resources available to bushwalkers and I have included some information below.
The most comon walks in the Colo river area are: