If you ride these trails you have probably seen a lot more walkers recently.

Every year Oxfam organise an event called "Trailwalker" for 2000 walkers to raise several million dollars to combat poverty:

http://www.oxfam.org.au/trailwalker/sydney/

This 100km walk this year is on 29-31 August 2008 and goes through the Cascades [Ridge Top, Quarry, Bare Creek & Cascades tracks] and Bantry Bay [near Ararat Reserve]