Did you ever think it ironic going on bushwalks to enjoy nature and fresh air and yet often we go by car! Since Sydney is the only city in Australia (and the world?) which has rail access to several national parks this group has been set up exclusively for such walks. It also means we get to chat on the train.
Of course you may live near one of these walks and not near public transport in which case it would be understandable to drive and meet the rest of us for the actual walk.
As well as our own events, whenever another meetup walking group has such a walk you will be notified and we will endeavour to make it a joint meetup.
In defiance of the meetup trend, all new members are expected to make a slight effort to say something about themselves beyond simply writing "I like walking" or "This group sounds excellent" or "I like to have fun!". Everyone has passions in their life (they need not be environmentally related). We can't be expected to connect with the Earth if we are reluctant to connect with each other in any meaningful way.