At 1380m Mount Tennent is the first mountain you see when heading to Namadgi! It’s a great mountain, and I think that all Canberran’s should climb it at least once! It offers a great experience, and fantastic views! So, if you haven’t been up, and need a little more incentive - here you go!
Being a 7km hike/ride (14km return) – and about 700m worth of climb - it is not trivial - but in my book - that equals lots of fun! And all on a well-formed fire trail! (Well, except for some tiny off track bits to find the caches). Just make sure you bring plenty of water, and some warm cloths!
It seems that trails are all the rage at the moment! What? 1 smiley for climbing Mt Tennent not enough? Certainly it was in the old days! – In fact, today as I went up there, there were MANY people on this mountain (more than 20), climbing it for no smiley’s at all! - Just for the views! But of course you will have to continue another 180 metres past #21 to get those 
There is no requirement to complete this all in one hit! Just keep going until you are beginning to feel tired, and then turn back. If it seems to be taking too long, keep in mind that the record from bottom to top is 55 minutes (by Mtbikeroz), and down again is 15 minutes 45 seconds (by intensezuri) – not that I am in any way suggesting you should try to beat those times - madness! – Just do as I did – enjoy it, and take a little over 4 hours all up