Favourite overnight walks in Canberra region?

...or, where should I go walking in the rain this weekend? 
I've found it a bit tricky finding information on walks in the area, compared to Tassie. Probably looking in the wrong places I guess.
AFAICT access to the Brindies basically requires a 4WD for access... which my Barina definitely ain't.

I've found it a bit tricky finding information on walks in the area, compared to Tassie. Probably looking in the wrong places I guess.
AFAICT access to the Brindies basically requires a 4WD for access... which my Barina definitely ain't.