I just rode about the furthest I've ever been: most of it uphill too.
Total distance came in at 45.15 km in 2:11:35; average of 20.8okm/hour, and a massive top speed of 61.6km/hour.
I climbed from a starting elevation of 127m above sea level to over 308m!
I am so totally dead.
If you are at all interested in some of the places I went, start with the Torrens River, and don't forget Linear Park. Sadly, there's not much on the Kangaroo Creek reservoir.