This page will not work if you are using a browser which does not support PNG graphics and transparency. MSIE is known not to work, others may - I do not have access to them for testing. I know it works in Firefox and Safari (both Mac OS X).
Here are some of the hills which cyclists in northern Sydney tend to know and climb often. Choose the ones you wish to compare, and hit submit to see the graphs. If the graphs overlap the text here, make your window longer. Altitude is in metres and is relative to the start of the climb, not to sea level. Distance is given in kilometres and is given as 0 at the start of the climb. In this way a reasonable comparision can be made between hills.