Well, since everyone else is sharing info. It took last year's 3/4 winner (clearly a cat3 though, not a 4) 21:15 to climb it at 372 watts. I don't know how much he weighs, but unless he is a larger rider, thats a lot of watts. It is 4.2 miles long according to this winner.

Union vale took me 9 minutes, 1.73 miles @ 342 watts avg, but I went out too hard, so my Mean/median whatever were not 342. If I had been @342 the whole time it would have been a little faster.

What it means to me is that I need to start training longer intervals