Did that ride and in all I did 172km, and yes, my legs are toast. The ride up to O'Rielly's at Laminginton National Park in the Gold Coast was 25km, although there was a 10km lead up and it was hard work, the roads were rough and just sapped your legs and you had a head wind as well. The climb it's self wasn't too bad and for the most part I could get into a rhythm and I was constantly doing 20-22km/h. The last 10km were tough, and the last 4km was really hard with sections up to 20%! Plus combined with rough bumpy pot holed roads so narrow that cars in the opposite direction have to pull over and give way. That 4km on the descent was bad and I hated it, I felt like at times I was going to go over the handlebars, I'm not a bad descender when I feel comfortable with the roads and if I know it was. The whole way down was bumpy and some sections were narrow and you would come around a corner and there would be 5 or 6 cars coming up the opposite direction. Frankly the descent can go to hell as far as I'm concerned.
One guy in our group (who was ahead of me) tried to impersonate Johnny Hoogerland who (I didn't see it) when going over some cattle grids made a mistake and went into some barbed wire, although he had a small cut on his left hand (riding without gloves) and on his ankle and his Colnago frame had some scratches on it, but didn't even rip his kit up and got up and continued riding.
I got back in one piece and I think tomorrow will be a recovery ride.