Ride cancelled. There is a high POP for the rest of the day, with thunderstorms. Looks like the clouds are appearing quickly, and it would be unwise to do a ride with the threat of lightning.
Let's call this the big epic of the summer, 130k with lots of climbing (Sydenham, Snake Rd, Rattlesnake).
Some gravel on the way out (to save kms) but otherswise smooth. Lots of water and food stops along the way.