its a very nice ride looping around the canning river between the canning and mt henry bridges. well worth it.
the south of river looks a little different from what we to do, maybe there are some bicycle paths now I don't know about.
1) You couldn't get onto riverside drive from stirling bridge, we had to nip up a steel little hill above the left bank, and onto preston point drive, then onto point walter rd to the spit.
2) rode along burke drive
3) took the strand at majestic, nisbett, duncraig, canning beach rd to raffles
4) looped around canning, ditch perth water
North of river:
1) turn into the avenue from hackett drive, then birdwood, jutland.
2) got to do the last bit of jabe dodd hill past the bowling club, then onto bay view terrace

I have a cunning plan, as cunning as a fox who's just been appointed Professor of Cunning at Oxford University