I've ridden it the last two years. Great ride. Managed a gold ride last year.
Tap away up the Glandon. Views are excellent. Feed stop at top is manic. Descent is brilliant! Make sure you have good brakes.
Telegraph is tree lined so a nice ride. Again, the feedstop at the top is manic - better to keep going as there's a better one a few miles further on, before the Galibier starts.
Galibier is the daddy, and this is where you'll start to tire and find out how good your fitness/endurance is.
Descent off the Galibier is long, so make sure you're winstoppered/giletted up. Watch out for the dark tunnels (rest sunnies on end of nose...) and careful riding in big groups in case they concertina up.
Save everything for AdH! If you've shot your load on the previous 3 climbs then you'll really suffer. Even if get it just right it's still a real challenge. Eat and drink and caffeine gel it on the approach.
I ran with a SS jersey, arm warmers, gilet and full w/proof shell (Montane Featherlite) which was bang on both years. I carried and ate about 6 ZipVit bars and 6 smart gels, and enough powder to re-fill my bottles maybe three or four times, plus I grazed on the cheese butties/flapjacks at the feed stations. Don't run your tyres too hard as the extra rim temp on descents will push this up even further - I saw plenty of riders with blowouts (I ran tubeless).
Good luck. It's a belting day in the mountains.
[I ran 33/48 and a 11-28 cassette, which was perfect]
Maratona dles Dolomites for me this year - crazy Italians!
me too aP