Great walk to a beautiful hut, great for overnight (bring a a tent, not recommended to use huts except in emergency). Can also walk in/out via Caloola Farm, 6kms. Very cold in winter!
Walk along Naas River. Info posts along the way. All on fire trail. Also goes past Demandering Hut. Both huts are in good condition, recommended to take a tent though & avoid staying in the huts except in case of emergency. Most Namadgi huts have basic supplies - matches, info, wood etc.
A 30min drive from Canberra, Mount Tennent is a great half-day walk that incorporates part of the Australian Alps Walking Track and offers expansive views from the summit. Parts of its are fairly steep, as you are climbing about 800m to the summit (elevation 1,375m asl).