A popular climb because of it's proximity to Melbourne, it's hard to see there's more than a big hill to climb as you approach from the main road, but "Donna" is a full-on mountain climb by any standards. There's only one tiny rest, about one third of the way up at a road junction it's flat for about a minute. At least in FulGaz you won't need to do the freezing, sub-zero descent.
Don't have FulGaz already?
Download FulGaz now and ride Mount Donna Buang on your home trainer. You'll then feel every change in gradient and see every turn in up to 4K video.