Gyoza wrote:28km from Werribee to You Yangs, so anything from maybe 1h10m to 1h30m depending on the wind (which can be pretty nasty on a bad day...very flat area with no protection)
7km (slightly downhillish) from You Yangs to Lara if you need to jump back on the train there.
Hope that helps.
Should be fine for me then, if you are expecting it wouldn't take more than 1 hour 30 to get to the start. I can always head back early if need be. I might in fact be able to get a lift to Geelong from somewhere along the highway, in which case I would have more time up my sleeve..... will see what happens with that.